Chevrolet Silverado / GMC Sierra. Manual — part 87

Use the feeler gage to check the clearance at the oil pan-to-transmission housing
measurement points (1). If the clearance exceeds 0.3 mm (0.011 in) at any of the oil pan-to-
transmission housing measurement points (1), then repeat the step until the oil pan-to-
transmission housing clearance is within specifications. The oil pan must always be forward
of the rear face of the engine block.

Fig. 275: Oil Pan Bolts & Nuts Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

8. Tighten the oil pan bolts and nuts in the sequence shown.

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Tighten: Tighten the bolts to 25 N.m (18 lb ft).

9. Measure the clearance at the oil pan-to-transmission housing measurement points in order to

ensure proper alignment.

Fig. 276: Identifying Oil Drain Plug
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

10. Install a NEW drain plug O-ring seal onto the drain plug.

11. Install the drain plug.

Tighten: Tighten the plug to 25 N.m (18 lb ft).

Fig. 277: Manual Transmission Bolts
Courtesy of GENERAL MOTORS CORP.

12. Install the transmission cover.

Tighten: Tighten the bolts to 12 N.m (106 lb in).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 278: Automatic Transmission Bolts
Courtesy of GENERAL MOTORS CORP.

13. Install the automatic transmission bolts, if equipped.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado