Question about 1998 GMC Envoy

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98 GMC ENVOY oil pan has two partialy blocked bolts,how do i remove them?

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  • Adam Muehlbauer
    Adam Muehlbauer May 04, 2011

    Is it the 4wd or the 2wd envoy?

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You may have to loosen the engine-to-frame mounts and slightly raise the motor to access these. Always use jack stands when lifting something as heavy as the engine for safety.

Posted on May 04, 2011

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How to remove oil pan gasket from 2002 GMC Yukon Denali?


I just changed my oil pan gasket on my 2001 GMC Yukon Denali. Once all bolts are off the oil pan, the pan and off the block it has no clearance because the differential is in the way. I removed half the diffential since the housing is split in the center. You will see bolts on the differential housing, remove those. But before the diff can come out to make room for the pan to drop you have to remove the axel attached to the diff on the passenger side. Once the axel is off the diff you have room to remove half the diff. Make sure to drain the gear oil first. It take a bit off pulling and wiggling but it will come off. Once that's clear the oil pan is completely free to come out. Hope this helps.

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What is involved with replacing the oil pan on 1998 GMC Sierra?


  • Step 1 Raise the truck using the proper equipment. Use a ramp or a jack and jack stands to support the vehicle securely by following all directions for use provided by this equipment's manufacturer.
  • Step 2 Drain all oil from the Silverado by placing an oil drip pan under the vehicle's engine block, directly under the oil drain plug. The drain plug is located on the oil pan, between the vehicle's tires underneath the vehicle. Use a wrench to loosen and remove the plug allowing the oil to drain into the pain below.
  • Step 3 Notice the various items attached to the oil pan or in the way of the oil pan dropping. For the oil pan to drop, remove the negative battery cable, front differential (only for four-wheel drive vehicles) and the under body shield by using a wrench or socket set.
  • Step 4 Remove the oil pan shield by loosening the four bolts holding it in place along the edges of the shield. Then, remove the cross brace, oil filter, the transmission to oil pan bolts and the oil level sensor.
  • Step 5 Follow the removal of those pieces by removing the bolts from the two front wiring harness, the engine wiring harness retainer, engine oil cooler pipe to oil bolts and the transmission oil cooler pipe retainer using a wrench. Located the closeout covers and bolts located on each side of the engine and remove them.
  • Step 6 Disconnect each of the oil pan bolts using a wrench that will allow the oil pan to drop. The oil pan gasket will also fall off and replacement should occur before reinstalling the oil pan.


  • Read more: How to Drop the Oil Pan in a Chevy Silverado | eHow.com http://www.ehow.com/how_4508109_drop-oil-pan-chevy-silverado.html#ixzz0wi82Ul2u

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    3. If necessary remove the exhaust pipe crossover.
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    5. On 1996-98 models, remove the oil filter and if equipped, the oil filter adapter.
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    7. Remove the strut rods, if equipped.
    8. Remove the oil pan and discard the gaskets.
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    1. Apply a suitable sealant such as GM part number 12346192 or its equivalent to the front cover-to-block joint and to the rear crankshaft seal-to-block joint. Apply the sealant about 1 inch (25mm) in both directions from each of the four corners.
    2. Clean all gasket surfaces and use new gaskets to assemble.
    3. Install new gasket and seals.
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    8. If removed, install starter, starter brace and bolt.
    9. If equipped, install the oil filter adapter.
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    14. Fill the engine with oil and check for leaks.

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    How do I replace the oil pan gasket on a 2001 GMC Yukon XL?


    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.
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    Reattach the exhuast pipe to the hangers.
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