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Disconnect the negative battery cable.
Remove (UPPER RADIATOR CROSS MEMBER) and relocate (UPPER RADIATOR CROSS
MEMBER REMOVED) the upper radiator crossmember, (Refer to 23 -
BODY/EXTERIOR/RADIATOR CROSSMEMBER - REMOVAL).
Remove the radiator fan module (FAN MODULE IN VEHICLE) (Refer to 7 - COOLING/ENGINE/RADIATOR FAN - REMOVAL).
Remove the wiring harness clip from front mount.
Remove the coolant line clamp bolt (COOLANT LINE BRACKET).
Remove the upper nut from the front mount (FRONT RUBBER MOUNT UPPER NUT).
Remove the upper starter mounting bolt (UPPER STARTER BOLT).
Remove the middle starter bolt (MIDDLE STARTER BOLT).
Raise vehicle and support.
Remove the lower front mount nut (FRONT RUBBER MOUNT IN POSITION).
Raise and support engine (SUPPORT ENGINE).
Remove the lower bracket bolt to transmission (BRACKET TRANS BOLT).
Remove the lower bracket bolt to engine block (BRACKET ENGINE BLOCK BOLT).
Relocate the front mount and bracket.
Disconnect the positive battery cable from starter
Disconnect the solenoid connector from starter.
Remove the lower starter bolt (STARTER LOWER BOLT).
Remove starter from vehicle.
Just did this last week. Repair manual says to disconnect exhaust, power steering lines, shift linkage (manual), support engine, unbolt from subframe, then lower subframe. I said bull. I merely cut the two bolts in the front and went to my local u-pull it for the 2 bolts. When I installed them, I went up from underneath and put the nuts on the top. The back 2 remained the same.
Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal..
Raise and support the front of the vehicle on jackstands.
Remove the exhaust pipe-to-manifold nuts.
Support the catalytic converter, then disconnect the pipe from the converter. Remove the pipe.
Remove the exhaust gaskets.
Be sure to use all new gaskets when required. Assemble the system, check the clearance and tighten the bolts to about 15-30 ft. lbs. (20-41 Nm).
Fig. 1: Front exhaust pipe connection common on vehicles with the catalytic converter not included
All clamps should be tightened to about 18-25 ft. lbs. (24-34 Nm). Do overtighten the clamps. If pipes become dented they can leak.
Changing the oil pan gasket on a GMC Yukon XL is realtively simple, but does require removal of the exhaust pipe. You will need a new oil pan gasket and a new exhaust pipe flange gasket. Put the car on ramps or jacks to access the undercarriage. Remove the exhaust pipe by removing the 3 nuts holding the exhaust pipe flange to the exhaust manifold. These nuts often rust and prior application of penetrating oil may be required to remove them without damage. Once the pipe is unbolted, work the exhaust system loose from the hanging brackets. In most cases the entire system does not have to be removed since there is enough room to remove the pan with only the front hangers removed. Drain the oil from the engine Remove the 10 mm bolts holding the pan to the block. Remove the old gasket material and scrape any remaining gasket from the block and pan. Install the new gasket. Forma-Gasket or a similar product may be used in small quantities to "glue" the new gasket in place and prevent shifting while the pan is reattached to the block. Reinsall the 10 mm bolts in a cross pattern to ensure the gasket is compressed evenly. Do not overtighten the bolts. Replace the pipe to flange gasket between the exhaust pipe and the exhaust manifold with a new part. Reattach the exhuast pipe to the hangers. Install the 3 bolts connecting the pipe flange to the exhaust manifold. Fill the engine with oil.
I think you have to remove headrst bfore folding seat back down. You may have to unbolt seat from floor. 4 bolts.
Rear Seat Backrest —Split Bench
Removal NOTE: The 40% rear seat backrest must be removed before the 60% rear seat backrest. 40% rear seat backrest
Remove the 40% rear seat backrest.
Remove the nuts and bolts.
Remove the backrest.
60% rear seat backrest
Remove the 60% rear seat backrest.
Remove the nut and bolt.
Remove the backrest.
Installation NOTE: The 60% rear seat backrest must be installed before the 40% rear seat backrest. 60% rear seat backrest
NOTE: Do not tighten the nut and bolt at this time. Install the 60% rear seat backrest.
Install the rear seat backrest.
Install the nut and bolt.
40% rear seat backrest
NOTE: Do not tighten the nuts and bolts at this time. Install the 40% rear seat backrest.
Install the rear seat backrest.
Install the nuts and bolts.
60/40% rear seat backrest
Tighten the 60/40% rear seat backrest nuts and bolts in the sequence shown.
40% Rear Seat Backrest
Tighten the 40% rear seat backrest nuts and bolts in the sequence shown.