General Information: Other GMC Envoy II

Arrows and Symbols

This service manual uses various symbols in order to describe different service operations.

Scheme 4

Dealers

All U.S. Dealers participating in the GM Common Training Program can enroll through the GM Common Training System Website at https://www.gmcommontraining.com. Within the website, there are individual training paths that are designed to assist in planning the training needs for each individual. Technicians should advise their Service Manager of their training needs including course names and course numbers. Dealers who have questions about GM Common Training should contact the GM Common Training help desk at 1-888-748-2686. The help desk is available Monday through Friday, 8:00 am-8:00pm Eastern Standard Time, excluding holidays. For GM Access support, contact the GM Access Help Desk at 1-888-337-1010.

Fleets

GM Fleet customers with GM Warranty In-Shop agreements are able to participate in service technical training through GM Common Training/GM Service Technical College (STC).

Assistance for all GM fleet customers using GM STC products and services is provided on the Internet via www.gmcommontraining.com using the "Contact Us" button on the site and/or the GM Common Training Help Desk at 1-888-748-2687. To order GM STC Training Materials, please contact the GM Training Materials Headquarters at 1-800-393-4831.

Most GM STC course materials have associated charges.

To purchase authentic GM STC Training Materials, contact the GM Training Materials Headquarters at 1-800-393-4831.

Non-GM Dealer Technicians

Technicians training for non-GM dealers is available through ACDelco. This training is for ACDelco customers employed in the automotive or truck service industry.

ACDelco courses are available at all approved GM Training Centers. Availability and schedules can be obtained by calling 1-800-825-5886 or contact us via the web at www.acdelcotechconnect.com and select the training button. Clinics are also offered through ACDelco Warehouse Distributors. Contract your dealer directly for more information.

Scheme 5

The vehicle identification number (VIN) plate (1) is the legal identifier of the vehicle. The VIN plate is located on the upper LH corner of the instrument panel (I/P) and can be seen through the windshield from the outside of the vehicle

Vehicle Identification Number (VIN) System

RPO Code List

RPO Code List

Metric Fasteners

This vehicle provides fastener dimensions using the metric system. Most metric fasteners are approximate in diameter to equivalent English fasteners. Make replacements using fasteners of the same nominal diameter, thread pitch, and strength.

A number marking identifies the OE metric fasteners except cross-recess head screws. The number also indicates the strength of the fastener material. A Posidrive® or Type 1A cross-recess identifies a metric cross-recess screw. For best results, use a Type 1A cross-recess screwdriver, or equivalent, in Posidrive® recess head screws.

GM Engineering Standards and North American Industries have adopted a portion of the ISO-defined standard metric fastener sizes. The purpose was to reduce the number of fastener sizes used while retaining the best thread qualities in each thread size. For example, the metric M6.0 X 1 screw, with nearly the same diameter and 25.4 threads per inch replaced the English 1/4-20 and 1/4-28 screws. The thread pitch is midway between the English coarse and fine thread pitches.

Scheme 6

The most commonly used metric fastener strength property classes are 9.8 and 10.9. The class identification is embossed on the head of each bolt. The English, inch strength classes range from grade 2 to grade 8. Radial lines are embossed on the head of each bolt in order to identify the strength class. The number of lines on the head of the bolt is 2 lines less than the actual grade. For example, a grade 8 bolt will have 6 radial lines on the bolt head. Some metric nuts are marked with a single digit strength identification number on the nut face.

The correct fasteners are available through GM SPO. Many metric fasteners available in the aftermarket parts channels are designed to metric standards of countries other than the United States, and may exhibit the following

1. Lower strength
2. No numbered head marking system
3. Wrong thread pitch

The metric fasteners on GM products are designed to new, international standards. The following are the common sizes and pitches, except for special applications

1. M6.0 X 1
2. M8 X 1.25
3. M10 X 1.5
4. M12 X 1.75
5. M14 X 2.00
6. M16 X 2.00

Adhesive Coated Fasteners

These fasteners accomplish the thread interface by the presence of a thread-locking compound on the fastener threads. Refer to the appropriate repair procedure in order to determine if the fastener may be reused and the applicable thread-locking compound to apply to the fastener.

Scheme 7

A prevailing torque fastener may be reused ONLY if

1. The fastener and the fastener counterpart are clean and not damaged
2. There is no rust on the fastener
3. The fastener develops the specified minimum torque against its counterpart prior to the fastener seating

Metric Prevailing Torque Fastener Minimum Torque Development

English Prevailing Torque Fastener Minimum Torque Development

Thread Inserts

General purpose thread repair kits. These kits are available commercially.

Repair Procedure

1. Determine the size, the pitch, and the depth of the damaged thread. If necessary, adjust the stop collars on the cutting tool and tap to the required depth.
2. Drill out the damaged threads. Clean out any chips.
3. Lubricate the tap with light engine oil. Tap the hole. Clean the threads.
4. Thread the thread insert onto the mandrel of the installer. Engage the tang of the insert onto the end of the mandrel.
5. Lubricate the insert with light engine oil, except when installing in aluminum and install the insert.
6. If the tang of the insert does not break off when backing out the installer, break the tang off with a drift.

Registered and Non-Registered Trademarks

Listed below are Registered Trademarks (®) or Non-Registered Trademarks (™) which may appear in this service manual.

Registered and Non-Registered Trademarks

Cutting Keys

After the code has been determined from the code list or the key code diagram, perform the following steps

1. Cut a blank key to the proper level of each of the tumbler positions.
2. Inspect the key operation in the lock cylinder.

Tools Required

J 41340 Ignition Lock Holding Fixture. See Special Tools .

1. Determine the tumbler numbers/arrangement: Place the tip of the key directly over the tip of the illustrated key. Inspect that the diagram outlines the key. Starting with position 1 (open end of cylinder), find and record the lowest level (tumbler number) that is visible. Repeat the previous step for positions 2-10.
2. Starting with position 1, insert the tumblers (4) into their corresponding slots in the coded order.
3. Using your fingers, pull out the side bar (3) until the tumblers fall completely into place.
4. Insert one tumbler spring (2) above each tumbler (4).
5. Lubricate the tumblers using Superlube® GM P/N 12346241 or equivalent.
6. Insert the spring retainer (1) prongs into the slots at the end of each cylinder.
7. Press down the retainer (1) until fully seated in the depression.
8. Inspect for proper tumbler installation: Hold the spring retainer (2) in position. Insert the key (1) into the cylinder. The side bar (3) should drop down flush with the cylinder diameter if properly installed. Disassemble and assemble properly as needed.
9. Remove the key.
10. Secure the cylinder in the J 41340 . See «Special Tools»(ref-200385-S23303083092005102000000) . Inspect that the spring retainer is facing up and positioned directly under the punch slots. Push the cylinder into the J 41340 until butted with the cylinder bezel. See «Special Tools»(ref-200385-S23303083092005102000000) . Tighten the holding screw.
11. Stake the bezel end of the retainer in place: Hold the flat side of the punch, part of J 41340 , squarely against the face of the cylinder bezel. See «Special Tools»(ref-200385-S23303083092005102000000) . Stake the lock cylinder metal over the retainer corners.
12. Stake the other end of the retainer: Remove the punch, part of J 41340 . See «Special Tools»(ref-200385-S23303083092005102000000) . Rotate the punch, part of J 41340 , 180 degrees. See «Special Tools»(ref-200385-S23303083092005102000000) . Hold the punch, part of J 41340 , squarely against the end of the punch slot on J 41340 . See «Special Tools»(ref-200385-S23303083092005102000000) . Stake the metal over the other end of the retainer.
13. Loosen the holding screw.
14. Remove the cylinder from the J 41340 . See «Special Tools»(ref-200385-S23303083092005102000000) .
15. Inspect that the retainer is properly staked. Restake as needed.
16. Lubricate the cylinder retainer slot.
17. Insert the following parts into the cylinder retainer slot: The retainer spring (2) The retainer (3)
18. Lubricate the following parts with GM P/N 12345996 or equivalent as needed: The detent pins (1) The cylinder retainer (3)

Side Door Lock Cylinder Coding

The side door lock cylinder has five snap-in tumblers. The number 1-5 positions (beginning closest to the cylinder head) is a brass retainer tumbler. The 6-10 positions are standard tumbler positions. Therefore, only the 6-10 positions are required.

Lifting and Jacking the Vehicle

Note. Perform the following steps before beginning any vehicle lifting or jacking procedure: Remove or secure all of the vehicle's 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's 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's contents.

For lifting the vehicle, various lift points are recommended. Before you begin any lifting procedure, place the vehicle on a clean, hard, level surface. Verify that all the lifting equipment meets weight standards and is in good working order. Verify that all of the vehicle loads are equally distributed and secure. If you are only supporting the vehicle at the frame side rails, verify that the lifting equipment does not put too much stress on, or weaken, the frame side rails.

During hoisting, do NOT damage the fuel tanks, the exhaust system, or the underbody.

Scheme 8

Scheme 9

Position the front hoist pads under the front frame between the lower control arm and the frame pad.

Scheme 10

Position the rear hoist pads under the rear spring, just behind the hanger

Scheme 11

Position the front lift under the outer edge of the front suspension lower control arms.

Scheme 12

Position the rear lift under the axle housing tubes on each side of the differential.

Do not damage the stabilizer bar.

Jacking

When you are lifting a vehicle with a vehicle jack or a floor jack, block the wheels at the opposite end from which you are lifting. Use jack stands to provide additional support.

Scheme 13

Position the floor jack pad under the frame rail pad.

Scheme 14

Position the floor jack pad under the center of the rear axle differential.

Do not damage the establisher bar.

Scheme 15

Position the jack under the rear spring hanger.

Jack Stands

When you support the vehicle with jack stands, place the jack stands under the frame, the front suspension crossmember, or the rear axle.