MODEL IDENTIFICATION
| WARNING | Vehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system-related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. If necessary, deactivate SIR system before servicing components. See DISABLING & ACTIVATING AIR BAG SYSTEM in RESTRAINTS. |
| CAUTION | When battery is disconnected, radio may go into anti-theft protection mode. Obtain radio anti-theft protection code from owner prior to servicing vehicle. |
Note. Any information not covered in this article may be found in AVALANCHE, ESCALADE, SIERRA, SILVERADO, SUBURBAN, TAHOE & YUKON article in MANUAL A/C-HEATER SYSTEMS.
| Model | (1) Body Designation | ||
|---|---|---|---|
| Chevrolet | |||
| Silverado | |||
| 2WD | "C" | ||
| 4WD | "K" | ||
| Silverado HD | |||
| 2WD | "C" | ||
| 4WD | "K" | ||
| GMC | |||
| Sierra | |||
| 2WD | "C" | ||
| 4WD | "K" | ||
| Sierra HD | |||
| 2WD | "C" | ||
| 4WD | "K" | ||
| (1) The 5th digit of the vehicle identification number. | |||
| (1) | The 5th digit of the vehicle identification number. |
MODEL IDENTIFICATION
DESCRIPTION & OPERATION
Note. References to HVAC are manufacturers terms for the Heating, Ventilation and Air Conditioning system. This term is also used for non air conditioned vehicles to describe the system in general. Many components referred to in this article are on air conditioned vehicles only. The manufacturer does not separate the HVAC component tests or removal and installation procedures by "heater only" or "air conditioned only" information.
HVAC system is an electronically controlled blend-air system. Air entering vehicle must pass through or around heater core to provide air of desired temperature.