Chevrolet Silverado / GMC Sierra. Service manual — part 2749

Rotor Replacement (JH6) or Rear Brake Rotor Replacement (JH7) .

8. Install the tire and wheel. Refer to Tire and Wheel Removal and Installation .

9. Remove the safety stands.

10. Lower the vehicle.

DESCRIPTION AND OPERATION

GENERAL DESCRIPTION

All 15 series utility vehicles use a 5-link rear suspension system. The rear axle is attached to the
frame with the upper control arms, lower control arms, and a track bar. Two coil springs and a
link mounted rear stabilizer shaft complete the system.

All 25 series Utility models use a rear spring suspension system and a solid rear axle suspension
system. The rear axle is attached to the multi-rear springs by U-bolts. The front of the spring ends
are attached to the frame at the front hangers through rubber bushings. The rear of the spring ends
are attached to the frame with shackles that allow the springs to change their length, due to the
spring compressing, while the vehicle is in motion. The ride control is provided by 2 identical
direct dual-action shock absorbers that are angle-mounted between the frame and the brackets
which are attached to the axle tubes.

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS

Illustration

Tool Number/ Description

J 43631

Ball Joint Remover

2008 Chevrolet Silverado 1500

2008 SUSPENSION Rear Suspension - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

2008 ACCESSORIES & EQUIPMENT

Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

SCHEMATIC AND ROUTING DIAGRAMS

HEATED/COOLED SEAT SCHEMATICS

Fig. 1: Heated Seat - Driver
Courtesy of GENERAL MOTORS CORP.

Application

Specification

Metric

English

Seat Heater Switch Screw

2 N.m

18 lb in

Front Heated Seat Module Bolt

9 N.m

80 lb in

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 2: Heated Seat - Passenger
Courtesy of GENERAL MOTORS CORP.

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

DTC

Description

DTC B1925 or B2170

B1925 02: Left Seat Heater Cushion Sensor Circuit Shorted to

Ground

B1925 05: Left Seat Heater Cushion Sensor Circuit Shorted to

Battery or Open

B2170 02: Right Seat Heater Cushion Sensor Circuit Shorted

to Ground

B2170 05: Right Seat Heater Cushion Sensor Circuit Shorted

to Battery or Open

DTC B1935 or B2180

B1935 04: Left Seat Back Heater Circuit Open

B1935 0A: Left Seat Back Heater Circuit Rate of Change

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Below Threshold

B1935 0B: Left Seat Back Heater Circuit Current Above

Threshold

B1935 0C: Left Seat Back Heater Circuit Current Below

Threshold

B1935 0D: Left Seat Back Heater Circuit Resistance Above

Threshold

B1935 0E: Left Seat Back Heater Circuit Resistance Below

Threshold

B1935 1F: Left Seat Back Heater Circuit Intermittent

B2180 04: Right Seat Back Heater Circuit Open

B2180 0A: Right Seat Back Heater Circuit Rate of Change

Below Threshold

B2180 0B: Right Seat Back Heater Circuit Current Above

Threshold

B2180 0C: Right Seat Back Heater Circuit Current Below

Threshold

B2180 0D: Right Seat Back Heater Circuit Resistance Above

Threshold

B2180 0E: Right Seat Back Heater Circuit Resistance Below

Threshold

B2180 1F: Right Seat Back Heater Circuit Intermittent

DTC B2345

B2345 00: Seat Heater Disable Circuit

B2345 13: Seat Heater Disable Circuit High Temperature

B2345 42: Seat Heater Disable Circuit Calibration Data Set

Not Programmed

B2345 4B: Seat Heater Disable Circuit Calibration Not

Learned

DTC B2425 or B2430

B2425 04: Left Seat Cushion Heater Circuit Open

B2425 0A: Left Seat Cushion Heater Circuit Rate of Change

Below Threshold

B2425 0B: Left Seat Cushion Heater Circuit Current Above

Threshold

B2425 0C: Left Seat Cushion Heater Circuit Current Below

Threshold

B2425 0D: Left Seat Heater Cushion Circuit Resistance Above

Threshold

B2425 0E: Left Seat Heater Cushion Circuit Resistance Below

Threshold

2008 Chevrolet Silverado 1500

2008 ACCESSORIES & EQUIPMENT Seat Heating and Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado