GMC Yukon Parts

GMC Yukon Parts Questions & Answers

• Drive Shaft
  22845689
  Q: How to replace the rear Drive Shaft on GMC Yukon?

  A: Before removing the driveline components the technician must reference mark every piece accurately relative to both propeller shafts and axles and pinion flanges and output shafts to preserve the current relationship between components according to specified torque values. Begin by raising the vehicle. The propeller shaft requires two reference marks before removal: behind the transmission or Transfer Case and at the rear axle pinion yoke. Use a tool to detach both bolts and retainer components from the rear axle pinion yoke structure. Pounding on the yoke ears and inserting tools between yoke and Universal Joint must be avoided because it will lead to broken injection joints. Begin this operation by moving the propeller shaft toward the front to separate it from the rear axle pinion yoke and then push it all the way toward the tail to detach from the transmission or Transfer Case and finally extract the propeller shaft from the vehicle. Before installing the Slip Yoke inspect the pinion yoke splines for an adequate lubricant amount. If needed, lubricate using gm p/n 12345879 (Canadian P/N 10953511) or an equivalent component that meets gm specification 9985830 (RWD w/4-speed Automatic Transmission). Insert the propeller shaft into the transmission or Transfer Case while matching the reference marks from removal before attaching the rear axle pinion yoke by matching both reference marks. Extra precaution needs to be taken about fasteners. When complete you should install the yoke retainers and bolts and fasten them to 25 nm (18 lb ft) then lower the vehicle.
• Oxygen Sensor
  12583804
  Q: How to replace the Heated Oxygen Sensor - Bank 2 Sensor 1 on GMC Yukon?

  A: Firstly, raise and support the vehicle to replace the Heated Oxygen Sensor - Bank 2 Sensor 1. Detach the engine wiring harness electrical connector from the HO2S electrical connector and remove the connector position assurance (CPA) retainer. Nexty remove the HO2S clip from the engine wiring harness clip and hence remove the HO2S. When reinstalling, code the threads first when the old sensor is being reused with anti-seize compound GM P/N 12377953 or its equivalent because a special anti-seize compound made up of liquid grease and glass beads is applied the HO2S threads to make it easier to remove. Also, fit the HO2S and tighten it to 42 Nm (31 lb ft). There is no starter or alternator with the larger negative cable coming to the starter alter harness. I'll transmit information to the starter accessory loop function . Check the starter or alternator when troubleshooting other issues which may necessitate a rewrite.
• Output Shaft Seal, Front Inner
  22761722
  Q: How to replace the Front Drive Axle Inner Wheel Seal and Inner Shaft Bearing on GMC Yukon?

  A: Starting the replacement of both the front drive axle inner shaft seal and inner shaft bearing demands that you first lift the vehicle before draining the differential carrier assembly. Disassemble the right side seal or bearing through the steps of differential carrier case inner Axle Shaft extraction followed by removal of Clutch Fork assembly parts and inner Axle Shaft from its housing. The j 29369-1 or j 29369-2 should be utilized behind the inner Axle Shaft seal or bearing while holding the inner Axle Shaft housing in a vise which clamps only at the mounting flange. Use j 2619-01 as an attachment on j 29369-1 or j 29369-2 to extract inner Axle Shaft seal or bearing by supporting the wheel drive shaft at all times. To replace only the left side seal technicians must first mark the inner Axle Shaft and wheel drive shaft alignment and detach the shock module if servicing the 8.25 inch axle and then disconnect the wheel drive shaft from the inner Axle Shaft before removing the inner Axle Shaft and seal by striking it with a hammer and brass drift. Both the left side bearing along with the seal require the differential carrier assembly removal followed by vise placement and another Axle Shaft and seal removal process. Implementation requires j 8092 and j 36609 to set the right bearing followed by j 45225 and j 8092 for installing the new Axle Shaft seal. Insert the inner Axle Shaft with a soft-faced mallet before reassembling the inner Axle Shaft Clutch Fork assembly to the inner shaft housing and finally setting the inner Axle Shaft housing assembly back into the differential carrier case. For cases where you removed both the left side bearing and the left side seal follow the installation procedure again by correctly placing the inner Axle Shaft in the differential case side gear. The service completion for the 8.25 inch axle requires installing the shock module followed by wheel drive shaft connection to the inner Axle Shaft and tight bolt torque to 79 nm (58 lb ft) while differential carrier filling with proper fluid before vehicle lowering.
• Intake Manifold
  12580420
  Q: How to replace the intake manifold (RPO L92 - First Design) (6.2L) on GMC Yukon?

  A: To replace the Intake Manifold (RPO L92 - First Design) (6.2L), start by removing the air cleaner outlet duct and the generator. Next, pull of the engine harness retainer nut and take of the retainer from the stud and locator. Unplug the engine harness electrical connectors of the evap canister purge solenoid , manifold absolute pressure (MAP) sensor , ignition coil harness , left side fuel injectors , throttle actuator , engine coolant temperature (ECT) sensor , right side fuel injectors. Pull off the engine harness clips and collect the harness branches to tie them back so they don't get in the way. Reposition the brake booster vacuum hose clamp, disconnect the vacuum hose from the booster hose fitting, and connect it to the Intake Manifold. Remove the evap canister purge tube and fuel feed line quick connect fittings and take out a positive crankcase ventilation (PCV) hose. Loosen and take the Intake Manifold(500) and Intake Manifold gaskets(514) off, covering the cylinder head passages to prevent the entry of debris. If replacing the Intake Manifold leave it on the table clean, re-position the brake booster vacuum hose clamp and remove the vacuum hose from the manifold nipple. Remove the upper Intake Manifold cover nut and the cover, remove the MAP Sensor retainer and MAP Sensor, then you are ready for that next step of the project. Disconnect the evap tube quick connect fitting and pull out the evap as well as purge solenoid. The Throttle Body and its gasket must be removed together with the Fuel Rail along with lifting it up to displace all the injectors from their slots. Replace the Fuel Injector lower o-ring seals and remove the brake booster vacuum hose nipple. For installation, if Intake Manifold was changed, install new brake booster vacuum hose nipple, and new Fuel Injector lower o-ring seal soaked in clean engine oil, then install Fuel Rail and tighten the bolts to 10 n.m (89 lb in). Replace a new Throttle Body Gasket, throttle body, and its bolts/nuts also tightening to 10 n.m (89 lb in). Reinstall evap tube and purge solenoid, connecting evap tube qc fitting, lubricate the MAP Sensor seal, installing the MAP Sensor and retainer. Install the upper Intake Manifold cover and nut until tight, then install the brake booster vacuum hose to the Intake Manifold nipple and tighten it. Replace new Intake Manifold gaskets (514) and remove the Intake Manifold (500) cylinder head passage covers before installation. Pretighten the Intake Manifold bolts (512) just enough until snug, then torque them according to the specified sequence to 5 n.m (44 lb in) and a final step to 10 n.m (89 lb in). Mount and attach the pcv hose, the fuel feed line and evap canister purge tube quick connect fittings, and reconnect the brake booster vacuum hose to the booster fitting. Loosen the engine parts of the harness branches and then connect the ect sensor and attach the engine harness clip to the generator bracket tightening the bolt to 9 n.m (80 lb in). Join the engine harness electrical connectors on the right and left side fuel injectors, throttle actuator, and ignition coil harness and installing the cpa retainers and as well as the engine wiring harness electrical connector to the MAP Sensor and the evap canister purge solenoid. Finally, install the engine harness retainer to the stud and locator pin, install the retainer nut to 5 n.m (44 1b in), install the generator, while finishing the job with the air cleaner outlet duct install.