Definition of Danger, Warning, Caution, and Note
The diagnosis and repair procedures in a GM Service Manual contain both general and specific Dangers, Warnings, Cautions, Notes or Importants. GM is dedicated to the presentation of service information that helps the technician to diagnose and repair the systems necessary for the proper operation of the vehicle, however, certain procedures may present a hazard to the technician if they are not followed in the recommended manner . Dangers, Warnings, Cautions and Notes or Importants are elements designed to prevent these hazards, however, not all hazards can be foreseen. This information is placed at strategic locations within the service manual. This information is designed to prevent the following from occurring
- Serious bodily injury or death to the technician
- Damage to the vehicle
- Unnecessary vehicle repairs
- Unnecessary component replacement
- Improper repair or replacement of vehicle components.
- Any warning or caution that appears in this service category is referenced from the individual service categories.
DANGER Defined
When encountering a DANGER, you will be asked to take a necessary action or not to take a prohibited action. If a DANGER is not heeded, the following consequences may occur
- Serious bodily injury or death to the technician
- Serious bodily injury or death to other technicians in the workplace area
WARNING Defined
When encountering a WARNING, you will be asked to take a necessary action or not to take a prohibited action. If a WARNING is not heeded, the following consequences may occur
- Serious bodily injury to the technician
- Serious bodily injury to other technicians in the workplace area
- Serious bodily injury to the driver and/or passenger(s) of the vehicle, if the vehicle has been improperly repaired
CAUTION Defined
CAUTIONS call special attention to a necessary action or to a prohibited action. If a CAUTION is not heeded, the following consequences may occur
- Damage to the vehicle
- Unnecessary vehicle repairs
- Unnecessary component replacement
- Improper operation or performance of the system or component under repair
- Damage to any systems or components which are dependent upon the proper operation of the system or component under repair
- Improper operation or performance of any systems or components which are dependent upon the proper operation or performance of the system or component under repair
- Damage to fasteners, basic tools, or special tools
- The leakage of coolant, lubricant, or other vital fluids
NOTE or IMPORTANT Defined
NOTE and IMPORTANT statements emphasize a necessary characteristic of a diagnostic or repair procedure. NOTE or IMPORTANT statements are designed to do the following
- Clarify a procedure
- Present additional information for accomplishing a procedure
- Give insight into the reason or reasons for performing a procedure in the manner recommended
- Present information that will help to accomplish a procedure in a more effective manner
- Present information that gives the technician the benefit of past experience in accomplishing a procedure with greater ease
Approved Equipment for Collision Repair Warning
| WARNING | To avoid personal injury when exposed to welding flashes or to galvanized (Zinc Oxide) metal toxic fumes while grinding/cutting on any type of metal or sheet molded compound, you must work in a properly ventilated area, wearing an approved respirator, eye protection , earplugs, welding gloves, and protective clothing. |
Batteries Produce Explosive Gases Warning
| WARNING | Batteries produce explosive gases. Batteries contain corrosive acid. Batteries supply levels of electrical current high enough to cause burns. Therefore, in order to reduce the risk of personal injury while working near a battery, observe the following guidelines: Always shield your eyes. Avoid leaning over the battery whenever possible. Do not expose the battery to open flames or sparks. Do not allow battery acid to contact the eyes or the skin. Flush any contacted areas with water immediately and thoroughly. Get medical help. |
Battery Disconnect Warning
| WARNING | Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components. For Vehicles equipped with OnStar® (UE1) with Back Up Battery: The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled (simply opening the driver door should disable retained accessory power) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with retained accessory power activated may cause activation of the OnStar® Back-Up Battery system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The back-up battery is not rechargeable and once activated the back-up battery must be replaced. |
Brake Dust Warning
| WARNING | Avoid taking the following actions when you service wheel brake parts: Do not grind brake linings. Do not sand brake linings. Do not clean wheel brake parts with a dry brush or with compressed air. Some models or aftermarket brake parts may contain asbestos fibers which can become airborne in dust. Breathing dust with asbestos fibers may cause serious bodily harm. Use a water-dampened cloth in order to remove any dust on brake parts. Equipment is available commercially in order to perform this washing function. These wet methods prevent fibers from becoming airborne. |
Brake Fluid Irritant Warning
| WARNING | Brake fluid may irritate eyes and skin. In case of contact, take the following actions: Eye contact-rinse thoroughly with water. Skin contact-wash with soap and water. If ingested-consult a physician immediately. |
Brake Fluid Warning
| WARNING | Use only Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT 3 brake fluid from a clean, sealed container. Do not use fluid from an open container that may be contaminated with water. Improper or contaminated fluid could result in damage to components, or loss of braking, with possible injury. |
Checking Hot Transmission Fluid through Drain Plug Hole Warning
| WARNING | The engine must be running when the transmission fluid fill plug is removed, or excessive fluid loss will occur. Transmission fluid may be hot. Since the actual fluid level is unknown, stand clear when removing the fill plug. Have a container ready to capture any lost fluid. Do not turn the engine off with the fill plug removed, as you can be injured by hot transmission fluid being expelled out of the oil fill opening. |
Collision Sectioning Warning
| WARNING | Sectioning should be performed only in the recommended areas. Failure to do so may compromise the structural integrity of the vehicle and cause personal injury if the vehicle is in a collision. |
Cracked Window Warning
| WARNING | If a window is cracked but still intact, crisscross the window with masking tape in order to reduce the risk of damage or personal injury. |
Defroster Outlet Warning
| WARNING | If broken glass falls into the defroster outlets, it can be blown into the passenger compartment and cause personal injury. |
Electric Coolant Fan Warning
| WARNING | An electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan. |
Exhaust Service Warning
| WARNING | In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool. |
Eye Protection Warning
| WARNING | Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury. |
Fuel and Evaporative Emission Pipe Warning
| WARNING | In order to reduce the risk of fire and personal injury observe the following items: Replace all nylon fuel pipes that are nicked, scratched or damaged during installation, do not attempt to repair the sections of the nylon fuel pipes Do not hammer directly on the fuel harness body clips when installing new fuel pipes. Damage to the nylon pipes may result in a fuel leak. Always cover nylon vapor pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher than 115°C (239°F) for more than one hour, or more than 90°C (194°F) for any extended period. Apply a few drops of clean engine oil to the male pipe ends before connecting fuel pipe fittings. This will ensure proper reconnection and prevent a possible fuel leak. (During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.) |
Fuel Vapors in Evaporative Emission Components Warning
| WARNING | Do not breathe the air through the EVAP component tubes or hoses. The fuel vapors inside the EVAP components may cause personal injury. |
Gasoline/Gasoline Vapors Warning
| WARNING | Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby. |
Glass and Sheet Metal Handling Warning
| WARNING | When working with any type of glass or sheet metal with exposed or rough edges, wear approved safety glasses and gloves in order to reduce the chance of personal injury. |
Halogen Bulb Warning
| WARNING | Halogen bulbs contain gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments. To help avoid personal injury: Turn off the lamp switch and allow the bulb to cool before changing the bulb. Leave the lamp switch OFF until the bulb change is complete. Always wear eye protection when changing a halogen bulb. Handle the bulb only by its base. Avoid touching the glass. Keep dirt and moisture off the bulb. Properly dispose of the used bulb. Keep halogen bulbs out of the reach of children. |
Hood Hold-Open Device Warning
| WARNING | When a hood hold open device is being removed or installed, provide alternate support to avoid the possibility of damage to the vehicle or personal injury. |
Hot Exhaust System Warning
| WARNING | While engine is operating, the exhaust system will become extremely hot. To prevent burns avoid contacting a hot exhaust system. |
Parking Brake and Drive Wheels Warning
| WARNING | Apply the parking brake and block the drive wheels before performing this procedure in order to prevent bodily injury. |
Protective Goggles and Glove Warning
| WARNING | Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury. |
R-1234yf Proper Service Procedures Warning
| WARNING | For personal safety, proper service procedure and refrigerant handling guidelines reference the applicable SAE standards when servicing vehicles equipped with R-1234yf refrigerant systems. Reference SAE J639, SAE J2845, SAE J2842, SAE J2843 & SAE J2851. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components. |
Radiator Cap Removal Warning
| WARNING | To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot. |
Relieving Fuel Pressure Warning
| WARNING | Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete. |
Repair Material Curing Warning
| WARNING | At least 24 hours are required for complete curing of repair material. The repair area should not be physically disturbed until after that time. Insufficient curing of urethane adhesive may allow unrestrained occupants to be ejected from the vehicle resulting in personal injury. |
Safety Glasses and Compressed Air Warning
| WARNING | Wear safety glasses when using compressed air in order to prevent eye injury. |
Safety Glasses Warning
| WARNING | Wear safety glasses in order to avoid eye damage. |
Safety Goggles and Fuel Warning
| WARNING | Always wear safety goggles when working with fuel in order to protect the eyes from fuel splash. |
Sensing and Diagnostic Module Handling Warning
| WARNING | Be careful when you handle a sensing and diagnostic module (SDM). Do not strike or jolt the SDM. Before applying power to the SDM: Remove any dirt, grease, etc. from the mounting surface Position the SDM horizontally on the mounting surface Point the arrow on the SDM toward the front of the vehicle Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. |
Sensing and Diagnostic Module Voltage after Ignition is Turned Off Warning
| WARNING | The sensing and the diagnosis module (SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for up to 1 minute after the ignition has been turned OFF and the fuse has been removed. If the airbags and pretensioners are not disconnected, do not begin service until one minute has been passed after disconnecting power to the SDM. Failure to do so may cause personal injury. |
Servicing the SIR System Warning
| WARNING | When performing service on or around the SIR components or the SIR wiring, follow the procedures listed below in order to temporarily disable the SIR system. Failure to follow the procedures could result in the following: Air bag deployment Personal injury Otherwise unneeded SIR system repairs |
SIR Inflatable Module Deployment Outside Vehicle Warning
| WARNING | When you are deploying an inflator module for disposal, perform the deployment procedures in the order listed. Failure to follow the procedures in the order listed may result in personal injury. |
SIR Inflator Module Handling and Storage Warning
| WARNING | When carrying an undeployed inflator module: Do not carry the inflator module by the wires or connector. Make sure the air bag opening points away from you. When storing an undeployed inflator module: Make sure the air bag opening points away from the surface on which the inflator module rests. Provide free space for the air bag to expand in case of an accidental deployment. When storing a steering column, do not rest the column with the air bag opening facing down and the column vertical. Lay the column on its side. Failure to observe these guidelines may result in personal injury. |
SIR Seatbelt Pretensioner Handling Warning
| WARNING | When carrying an undeployed inflatable restraint seat belt retractor pretensioner: Do not carry the seat belt pretensioner by the seat belt webbing or pigtail connector, if equipped. Carry the seat belt pretensioner by the housing, keeping hands and fingers away from the seat belt webbing. Make sure the opening, from which the seat belt webbing extends, faces downward and the seat belt webbing hangs freely. Failure to observe these guidelines may result in personal injury. |
SIR Warning
| WARNING | This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions: Air bag deployment Personal injury Unnecessary SIR system repairs In order to avoid the above conditions, observe the following guidelines: Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring. If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to SIR DISABLING AND ENABLING . |
Torque-to-Yield Fastener Warning
| WARNING | This component is equipped with torque-to-yield fasteners. Install a NEW torque-to-yield fastener when installing this component. Failure to replace the torque-to-yield fastener could cause bodily injury and damage to the vehicle or component. |
Work Stall Test Warning
| WARNING | One or more of the following guidelines may apply when performing specific required tests in the work stall: When a test requires spinning the drive wheels with the vehicle jacked up, adhere to the following precautions: Do not exceed 56 km/h (35 mph) when spinning one drive wheel with the other drive wheel stopped. This limit is necessary because the speedometer indicates only one-half the actual vehicle speed under these conditions. Personal injury may result from excessive wheel spinning. If all of the drive wheels are spinning at the same speed, do not exceed 112 km/h (70 mph). Personal injury may result from excessive wheel spinning. All persons should stay clear of the rotating components and the balance weight areas in order to avoid possible personal injury. When running an engine in the repair stall for an extended period of time, use care not to overheat the engine and the transmission. When a test requires jacking up the vehicle and running with the wheels and brake rotors removed, adhere to the following precautions: Support the suspension at normal ride height. Do not apply the brake with the brake rotors removed. Do not place the transmission in PARK with the drive axles spinning. Turn Off the ignition in order to stop the powertrain components from spinning. When running an engine in the work stall, use the exhaust removal system to prevent breathing dangerous gases. |
Air in the Power Steering System Caution
| CAUTION | If the power steering system has been serviced, an accurate fluid level reading cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise and may cause pump damage over a period of time. |
Avoid Damage to Grid Lines Caution
| CAUTION | If you use a razor blade or other sharp tool in order to remove the adhesives or foreign objects from the inside of the rear window, use the blade carefully. Damage to the grid lines may result. |
Belt Dressing Caution
| CAUTION | Do not use belt dressing on the drive belt. Belt dressing causes the breakdown of the composition of the drive belt. Failure to follow this recommendation will damage the drive belt. |
Brake Caliper Caution
| CAUTION | Support the caliper with a piece of wire to prevent damage to the brake line. |
Brake Fluid Damage to Electrical Connections Caution
| CAUTION | Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake fluid from contacting these areas. Always re-seal and wipe off brake fluid containers to prevent spills. |
Brake Fluid Effects on Paint and Electrical Components Caution
| CAUTION | Avoid spilling brake fluid onto painted surfaces, electrical connections, wiring, or cables. Brake fluid will damage painted surfaces and cause corrosion to electrical components. If any brake fluid comes in contact with painted surfaces, immediately flush the area with water. If any brake fluid comes in contact with electrical connections, wiring, or cables, use a clean shop cloth to wipe away the fluid. |
Catalytic Converter Movement Caution
| CAUTION | To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down. |
Clean, Dry, Low Pressure Gas Source Caution
| CAUTION | Use the Evaporative Emission (EVAP) System Tester (EEST) GE 41413-A in order to provide a clean, dry, low pressure nitrogen gas source. Do not substitute any other pressurized source, gas or otherwise. Damage may result to the EVAP system, test equipment or cause a safety risk. |
Clearcoat/Ultraviolet Screeners Caution
| CAUTION | Removing more than 0.5 mils of the clearcoat can result in early paint failure. The clearcoat contains ultraviolet screeners. Do not finesse sand more than what is required to remove the defect. |
Clutch Hydraulic System Lubricant Caution
| CAUTION | Do not use mineral or paraffin-base oil in the clutch hydraulic system. These fluids may damage the rubber parts in the cylinders. |
Component Fastener Tightening Caution
| CAUTION | Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage. |
Compressed Air Should Not Exceed 98 kPa (14 psi) Caution
| CAUTION | When using compressed air to remove components, air pressure should not exceed 98 kPa (14 psi). |
Correct Refrigerant Caution
| CAUTION | Use only the refrigerant and the charge amount specified in "Refrigerant System Specifications" found in HVAC Service Manual or the vehicles under hood refrigerant label. Use of incorrect refrigerant or charge amounts may result in poor system performance and premature system failure. |
Correct Refrigerant Lubricant Caution
| CAUTION | Use only the lubricant specified for this vehicles refrigerant system. Do not mix refrigerant oils which may result in system contamination and unknown reaction by-products which may cause HVAC System failure. |
Drive Axle Caution
| CAUTION | Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel. |
Engine Coolant Thermostat Housing Caution
| CAUTION | Use care when performing this procedure. Use of excessive force may damage the coolant thermostat. |
Engine Lifting Caution
| CAUTION | When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Lifting the engine in an unapproved manner may cause component damage. |
Engine Mounting Caution
| CAUTION | Broken engine mountings can cause misalignment of certain drive-train components. Misalignment of drive-train components causes eventual destruction of the drive-train components. If one engine mount breaks, the rest of the engine mounts will have increased stress put on them. This could cause the rest of the engine mounts to break. |
Exterior Trim Emblem Removal Caution
| CAUTION | Use a plastic, flat-bladed tool to prevent paint damage when removing an emblem/name plate. |
Fastener Caution
| CAUTION | Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Do not use paints, lubricants, or corrosion inhibitors on fasteners, or fastener joint surfaces, unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems. When using fasteners that are threaded directly into plastic, use extreme care not to strip the mating plastic part(s). Use hand tools only, and do not use any kind of impact or power tools. Fastener should be hand tightened, fully seated, and not stripped. |
Filling the Master Cylinder Caution
| CAUTION | When filling the master cylinder, use only Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT 3 brake fluid. Do not use a container which has been used for petroleum based fluids, or a container which is wet with water. Petroleum based fluids will cause swelling and distortion of rubber parts in the hydraulic brake system, and water will mix with brake fluid, lowering the boiling point. Keep all fluid containers capped to prevent contamination. |
Flex Decoupler Caution
| CAUTION | Do not over-flex or damage the flex joint when moving the flex joint from the normal mounting position. |
Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution
| CAUTION | Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system: The fuel pipe connections The hose connections The areas surrounding the connections |
Fuel Pressure Caution
| CAUTION | Do not allow the fuel pressure to exceed the specified value because damage to the fuel pressure regulator or the fuel pressure gauge may result. |
Fuel Tank Strap Fastener Caution
| CAUTION | Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty. |
Heated Oxygen and Oxygen Sensor Caution
| CAUTION | Do not remove the pigtail from either the heated oxygen sensor (HO2S) or the oxygen sensor (O2S). Removing the pigtail or the connector will affect sensor operation. Handle the oxygen sensor carefully. Do not drop the HO2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Do not use cleaning solvents of any type. Do not repair the wiring, connector or terminals. Replace the oxygen sensor if the pigtail wiring, connector, or terminal is damaged. This external clean air reference is obtained by way of the oxygen sensor signal and heater wires. Any attempt to repair the wires, connectors, or terminals could result in the obstruction of the air reference and degraded sensor performance. The following guidelines should be used when servicing the heated oxygen sensor: Do not apply contact cleaner or other materials to the sensor or vehicle harness connectors. These materials may get into the sensor causing poor performance. Do not damage the sensor pigtail and harness wires in such a way that the wires inside are exposed. This could provide a path for foreign materials to enter the sensor and cause performance problems. Ensure the sensor or vehicle lead wires are not bent sharply or kinked. Sharp bends or kinks could block the reference air path through the lead wire. Do not remove or defeat the oxygen sensor ground wire, where applicable. Vehicles that utilize the ground wired sensor may rely on this ground as the only ground contact to the sensor. Removal of the ground wire will cause poor engine performance. Ensure that the peripheral seal remains intact on the vehicle harness connector in order to prevent damage due to water intrusion. The engine harness may be repaired using Packard's Crimp and Splice Seals Terminal Repair Kit. Under no circumstances should repairs be soldered since this could result in the air reference being obstructed. |
Heated Oxygen Sensor Resistance Learn Reset Caution
| CAUTION | When replacing the HO2S perform the following: A code clear with a scan tool, regardless of whether or not a DTC is set HO2S heater resistance learn reset with a scan tool, where available Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure. |
HVAC Duct Heat Stake Caution
| CAUTION | When separating air conditioning ducts from each other care must be given not to break or damage the hot melted (heat staked) areas of some ducts Damaging the hot melt areas attaching the ducts to the instrument panel assembly may cause vibrations or rattling with-in the instrument panel assembly resulting in the instrument panel assembly needing to be replaced. |
Ignition OFF When Disconnecting Battery Caution
| CAUTION | Always turn the ignition OFF when connecting or disconnecting battery cables, battery chargers, or jumper cables. Failing to do so may damage the Powertrain Control Module (PCM) or other electronic components. |
Installing Hoses without Twists or Bends Caution
| CAUTION | The inlet and outlet hoses must not be twisted during installation. Do not bend or distort the inlet or outlet hoses to make installation easier. Failure to follow these procedures could result in component damage. |
Liftgate Assist Rod Caution
| CAUTION | Apply pressure only at the end of the liftgate/hood assist rod that you are removing or attaching. Do NOT apply pressure to the middle of the rod because damage or bending will result. |
Oxygen Sensor Caution
| CAUTION | Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor. |
Power Steering Hose Disconnected Caution
| CAUTION | Do not start the vehicle with any power steering gear inlet or outlet hoses disconnected. When disconnected, plug or cap all openings of components. Failure to do so could result in contamination or loss of power steering fluid and damage to the system. |
Refrigerant Pressure During Testing Caution
| CAUTION | Leak detection shall only be done with the refrigerant that is specified for the system. Do not attempt to increase pressure of the A/C refrigerant system with shop air or another type of refrigerant. Failure to follow the above guidelines could result in damage to the vehicle or its components. |
Silicon Contamination of Heated Oxygen Sensors Caution
| CAUTION | Contamination of the oxygen sensor can result from the use of an inappropriate RTV sealant (not oxygen sensor safe) or excessive engine coolant or oil consumption. Remove the HO2S and visually inspect the portion of the sensor exposed to the exhaust stream in order to check for contamination. If contaminated, the portion of the sensor exposed to the exhaust stream will have a white powdery coating. Silicon contamination causes a high but false HO2S signal voltage (rich exhaust indication). The control module will then reduce the amount of fuel delivered to the engine, causing a severe driveability problem. Eliminate the source of contamination before replacing the oxygen sensor. |
Steering Column in Lock Position Caution
| CAUTION | With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components: The steering column The steering shaft coupling The intermediate shaft(s) After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has became un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil. |
Steering Wheel in the Full Turn Position Caution
| CAUTION | Do not hold the steering wheel in the full turn position longer than 5 seconds, as damage to the steering pump may result. |
Steering Wheel Straight and Column Locked Caution
| CAUTION | With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components: The steering column The intermediate shaft(s) The steering gear After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has became un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil. |
Tape Corners of Panel Caution
| CAUTION | When removing body panels, apply tape to corners of panel and adjacent surfaces to help prevent paint damage. |
Test Probe Caution
| CAUTION | Do not insert test equipment probes (DMM etc.) into any connector or fuse block terminal. The diameter of the test probes will deform most terminals. A deformed terminal will cause a poor connection, which will result in a system failure. Always use the J-35616-F GM Approved Terminal Release Tool Kit in order to front probe terminals. Do not use paper clips or other substitutes to probe terminals. When using the J-35616-F GM Approved Terminal Release Tool Kit , ensure the terminal test adapter choice is the correct size for the connector terminal. Do not visually choose the terminal test adapter because some connector terminal cavities may appear larger than the actual terminal in the cavity. Using a larger terminal test adapter will damage the terminal. Refer to the J-35616-F GM Approved Terminal Release Tool Kit label on the inside of the J-35616-F GM Approved Terminal Release Tool Kit for the correct adapter along with the connector end view for terminal size. |
Torque-to-Yield Fastener Caution
| CAUTION | This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. |
Using Proper Power Steering Fluid Caution
| CAUTION | When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks. |
Vehicle Lifting and Jacking Caution
| CAUTION | Perform the following steps before beginning any vehicle lifting or jacking procedure: Remove or secure all of the vehicle contents in order to avoid any shifting or any movement that may occur during the vehicle lifting or jacking procedure. The lifting equipment or the jacking equipment weight rating must meet or exceed the weight of the vehicle and any vehicle contents. The lifting equipment or the jacking equipment must meet the operational standards of the lifting equipment or jacking equipment manufacturer. Perform the vehicle lifting or jacking procedure on a clean, hard, dry, level surface. Perform the vehicle lifting or jacking procedure only at the identified lift points. DO NOT allow the lifting equipment or jacking equipment to contact any other vehicle components. Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle contents. |
Windshield Installation Caution
| CAUTION | Do not use spacers when installing a windshield. The stress caused by the spacers may damage the windshield. |
