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General Motors produced the GMC Yukon as a full-size SUV after replacing the K5 Jimmy model in 1992. In 1992 General Motors launched the two-door GMC Yukon as their first-generation model following the GMT400 platform with a 111.5-inch wheelbase. The model featured a fuel-efficient 5.7-liter V8 engine as part of its performance engine options. In 2000 the GMT800 platform brought the second generation GMC Yukon to market while its design shifted toward aerodynamics and received a new 6.0-liter V8 engine option. In 2008, a hybrid variant was added to the third-generation Yukon lineup, using GM's 2-Mode Hybrid system to improve fuel efficiency and expand the model's versatility. Under the GMT921/922 platform this generation moved forward with improved driving dynamics together with enhanced handling. In 2013 the fourth generation of the GMC Yukon received an update which implemented the GMT K2XX platform with fold-flat second- and third-row seats to enhance functionality yet reduced available cargo area. GMC Yukon maintains its dedication to manufacturing high-quality products because its official factory produces genuine parts according to the vehicle's engineering standards.
The GMC Yukon vehicles pose three problems, which can be categorized as body hardware and electrical security systems. In body hardware, the power door lock actuator is compromised such that it locks slowly or does not lock at all. Clicks with no latch movement and with intermittent response are related to internal motor damage or gear breakage. A command test, voltage check, and linkage are the diagnosis of each affected door. Repair eliminates the defective power door lock actuator of the GMC Yukon, as well as checks its switch operation. In body hardware, snapping of inside and outside door handles when mounting on the pivot is a possibility. Rigid pulls, slack sensation, or a door that can not be opened indicate failure of the handles. The door handles are replaced to correct the latching on Yukon, and hinge lubrication ensures that less stress is experienced in the future. In electrical anti theft and ignition, the anti theft system can thwart a Yukon start. Worn ignition switch contacts do not provide a flashing security light and do not give a crank. Testing verifies required key recognition, relay commands, and correct voltage at the switch. Repair fits new ignition switch on GMC Yukon, codes cleared, and relearns completed. These measures will reinstate the lock function, handle integrity, and improve reliability on GMC Yukon vehicles.
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GMC Yukon Parts Questions & Answers
- 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.
- 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.
- 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.
- 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.
