Question about GMC Sierra 1500

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No reverse 2001 gmc 2500 hd 6L

Just stopped going in reverse. all other gears work

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You need to remove the transmission
first remove the oil pan if small parts of metal inside the transmission pan
there is no electronic that control the reverse
hope it helps

Posted on Mar 20, 2014

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Posted on Jan 02, 2017

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SOURCE: fan only works on high 02 gmc hd 2500

There is a resistor attached to the blower box. Replace the blower resistor and this should solve your problem

Posted on Sep 18, 2008

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SOURCE: Where is is the PCV

its on the right side valve cover sitting on top

Posted on May 03, 2011

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SOURCE: Where is the PCV valve

on the right side valve cover it sits on it

Posted on May 03, 2011

  • 116 Answers


You need an ohm meter and check to see if ther is power at the horns and lights. There is no programming that turns off the horn on the steering column. But I have one of these trucks and had the same problem with the lights and horns but it didn't happen at the same time. My lightbulbs burnt out and the actual horns under the bumper did to. Hope this helps.

Posted on Jun 29, 2011

  • 79 Answers

SOURCE: my 03 chevy 2500 6.0 hesitates before going into gear from park to drive and from park to reverse. other than that shifts fine in drive and all other gears.

The transmission in that vehicle has been known to have problems and will probably need to be rebuilt or changed in the near future, you can try an automatic transmission conditioner to revitalize the performance, I recomend a product called Lucas transmission conditioner this will help extend the transmission life and help recondition the belts in the transmission.

Posted on Sep 08, 2012

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