GMC Sierra 1500 Parts

GMC Sierra 1500 Parts Questions & Answers

• Water Pump
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  Q: How to replace the water pump (LU3) on a 4.3L engine on GMC Sierra 1500?

  A: The first step to replace a Water Pump (LU3) in a 4.3l engine is to eliminate the air cleaner outlet duct and Drive Belt. Empty the cooling system through either the vac-n-fill process or the static fill technique. Change the radiator outlet hose clamps at the surge tank and Water Pump before taking the hose off its connections on both components. Shift in position the hose clamps on the Water Pump inlet and take off the inlet hose. Install the j 41240 fan clutch remover and installer tool to grip the Water Pump Pulley. After removing all the pulley bolts replace these with the Water Pump bolts. Finally take out the Water Pump assembly by using the tool. Take out the worn gaskets from the Water Pump and examine the pump for damages before installing new components. When using saved bolts apply gm 12346004 (Canadian 10953480) sealant or its equivalent on Water Pump bolt threads. Place fresh Water Pump gaskets and the pump into position before fixing the bolts to 45 n.m (33 lb ft). Use the j 41240 (J 41240) to hold the Water Pump Pulley while tightening its bolts to 25 n.m (18 lb ft). Set the Water Pump hose clamps with their forward-pointing tangs level with the Water Pump inlet hose diameter. Position the inlet hose clamps before putting in the Water Pump inlet hose. Place the radiator outlet hose back onto both the Water Pump and surge tank before repositioning its clamps. Attach the Drive Belt and the air cleaner outlet duct to the vehicle. Complete the cooling system setup by choosing between vac-n-fill method or static fill method before testing for any fluid loss.
• Alternator
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  Q: How to replace the alternator on a V8 engine on GMC Sierra 1500?

  A: A v8 engine requires the removal of the negative Battery Cable during generator replacement. You should begin by removing both the intake manifold sight shield along with the accessory Drive Belt. Secondly, disconnect the engine harness electrical connector from the generator and move the generator battery jumper cable boot to its new position. Before removing the generator, start by disassembling the generator battery jumper cable nut along with the terminal from the generator stud and the generator bolts to extract the component. Loosen the existing generator bolts before placing a new generator in position and ensure it is securely in place. Tighten the generator bolts while maintaining a torque of 55 nm (41 lb ft). You should attach the generator battery jumper cable terminal to the generator stud while tightening the nut to 9 nm (80 lb in). Put the jumper cable boot on the generator battery terminal while joining the engine harness electrical connector to the generator. After installing the accessory Drive Belt and intake manifold sight shield, reestablish the vehicle's negative battery connection.
• Camshaft
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  Q: How to replace the camshaft on GMC Sierra 1500?

  A: The Camshaft replacement requires starting with Radiator and A/C Condenser extraction along with lifter and Timing Chain and Camshaft sprocket elimination followed by balance shaft drive gear removal. First you must remove both Camshaft retainer bolts and retainer while carefully handling the Camshaft to prevent damage to the Camshaft bearings because all Camshaft journals share the same diameter. The front bolt holes receive three 5/16-18 x 4.0 inch bolts to serve as handles during Camshaft extraction by rotating and pulling out the Camshaft. Preliminary bolt removal from the system enables subsequent examination and cleaning of the Camshaft along with bearings if necessary. Installation of a new Camshaft requires engine oil replacement alongside the filter change along with the addition of engine oil supplement to the oil reservoir. Proper lubricant must be applied to the engine Camshaft lobes and bearing journals and Camshaft bearings. Select three bolts to use as a handle for engine Camshaft installation and afterward remove these bolts while applying threadlocker to reused fasteners when possible. Screw in the Camshaft retainer bolts until they achieve a torque of 12 n.m (106 lb in), then add the balance shaft drive gear, timing chain, Camshaft sprocket, lifters, a/c condenser and finish with the Radiator installation.
• Output Shaft Seal, Front Inner
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  Q: How to replace the Front Drive Axle Inner Wheel Seal and Inner Shaft Bearing on GMC Sierra 1500?

  A: The repair process for both front drive axle inner shaft seal and inner shaft bearing requires users to first service the differential carrier assembly by draining it while lifting the vehicle. Start by disassembling differential carrier case and removing Clutch Fork assembly components as well as inner Axle Shaft before access to right side seal or bearing inside inner Axle Shaft housing. Position the inner Axle Shaft housing within a vise clamp only along the mounting flange. The j 29369-1 or j 29369-2 acts behind the inner Axle Shaft seal or bearing for necessary applications while the j 2619-01 attaches to these components to extract the seal or bearing. To replace the left side seal only users must first mark the inner Axle Shaft and wheel drive shaft alignment and then break the connection with the shock module if servicing the 8.25 inch axle, disconnect the wheel drive shaft from the inner Axle Shaft and remove the inner Axle Shaft and seal using a hammer and brass drift. A different procedure exists for differential carrier assembly extraction and vise positioning then inner Axle Shaft and seal removal on both left sides. The right side bearing installation requires j 36609 and j 8092 and the new Axle Shaft seal needs j 45225 and j 8092 to perform the installation process. Use a soft-faced mallet to tap the inner Axle Shaft gently into place before reintegrating housing components with the Clutch Fork. Finally, insert the differential carrier case with the inner Axle Shaft housing. When removing both the left bearing and seal install them according to the same sequence. Set the inner Axle Shaft correctly into the differential case side gear before reinstalling the front differential carrier assembly when possible. To install the left-side seal use the j 45225 along with a soft-faced mallet and return the wheel drive shaft to connect with the inner Axle Shaft while tightening bolts to 79 nm (58 lb ft). The final step entails adding the correct fluid into the differential carrier assembly after which the vehicle should be lowered.