Chevrolet Silverado / GMC Sierra. Service manual — part 1704

Starting System Description and Operation

Circuit/System Verification

Start the engine. Listen to the starter noise while the engine is cranking. Compare the concern to a
similar vehicle.

Circuit/System Testing

1. Remove the flywheel inspection cover.

2. Inspect the flywheel for the following:

Loose flywheel bolts

Chipped gear teeth

Missing gear teeth

Bent flywheel

Debris in the bell housing

If not within specifications, remove the debris, tighten the flywheel bolts, or repair or
replace the flywheel.

3. If all inspections were within specification, replace the starter motor.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Fastener Tightening Specifications for the 4.3L (LU3) engine

Fastener Tightening Specifications for the 6.6L (LMM) engine

Fastener Tightening Specifications for all other engines (w/o LU3 or LMM)

Engine Flywheel Replacement for the 4.3L (LU3) engine

Engine Flywheel Replacement for the 6.6L (LMM) engine

Automatic Transmission Flex Plate Replacement for all other engines (w/o LU3 or
LMM)

Starter Motor Replacement (4.3L) or Starter Motor Replacement (4.8L, 5.3L, 6.0L,
and 6.2L) or Starter Motor Replacement (6.6L)

REPAIR INSTRUCTIONS

BATTERY NEGATIVE CABLE DISCONNECTION AND CONNECTION (W/SINGLE BATTE
BATTERY)

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Electrical - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Disconnect Procedure

Fig. 5: View Of Battery Cable Components
Courtesy of GENERAL MOTORS CORP.

1. Turn off all the lamps and accessories.

2. Turn the ignition OFF.

CAUTION: Refer to Battery Disconnect Caution .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Electrical - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

3. Open the hood.

4. Loosen the negative cable nut (6).

5. Remove the negative battery cable from the battery terminal.

6. Reposition the negative battery cable away from the battery.

Connect Procedure

CAUTION: Refer to Battery Disconnect Caution .

IMPORTANT: Clean any existing corrosion from the battery terminal and the

battery cable end.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Electrical - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 6: View Of Battery Cable Components
Courtesy of GENERAL MOTORS CORP.

1. Position the negative battery cable to the battery.

2. Install the negative battery cable onto the battery terminal.

3. Tighten the negative cable nut (6).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Electrical - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado