Question about 2001 GMC Jimmy

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2001 jimmy why does my 2001 jimmy 4.3 4 wd only boil over when i go off roading and climb up mountian roads

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  • dragonring Jul 01, 2008

    the clutch fan is working properly

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If your truck is equipped with a clutch fan, the clutch may not be working properly.Start your truck and let it get to operating temp. and shut it off, the fan should stop rotating when the engine stops. If it continues to rotate, then the clutch is not working properly.

Posted on Jul 01, 2008

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2 Answers

Over heating during offroading


I am assuming you have the 4.3L V6 and it's 4wd. I use to have the same problem with a 96 S10. Typically when climbing hills it harder for the oil get pumped to the top of the motor, which can cause overheating. One little trick you can do is swap out the thermostat with one of a lower temp. Basically the thermostat is what controls coolant into the motor, On your Jimmy it opens at 190degree's, so no coolant flows through the motor until it hit's 190. You can replace the thermostat with one that opens at 160 or 165, this will allow more cooling time for the motor. I also had a 89 Jimmy that had this problem, infact my Jimmy overheated on the highway on hot days, I had put in a lower temp thermostat and problem solved on both these trucks.

Good Luck

Hope this helps

Jul 01, 2008 | 2001 GMC Jimmy

1 Answer

What is the normal oil pressure for a 2001 gmc jimmy 4.31 vortec v-6


25-30 psi at idle after engine is warm. 45-60 psi going down the road after engine is warm.

Aug 17, 2011 | 2001 GMC Jimmy

1 Answer

When should i use 4 wheel hi on 1996 chevy k1500


use 4 wheel high only on slippery surfaces like icey roads dirt roads mud etc. can go as fast as you want [not recomended on slippery surfaces]
low is only for hard pulling like towing something up a hill or climbing steep grades

Mar 25, 2010 | 1996 Chevrolet K1500

1 Answer

2005 ford ranger 4L 4x4 overdrive does not engage when button on shifter is pushed. I also do not see the light on the cluster on


If you have it in 4 LOW, you would never need overdrive. Overdrive is a road high gear that you would use only in 4 HIGH (or 4H) on your shifter. 4L (or 4 Low) would only be used in a very slow speed hill climb. You would NEVER use 4 Low on the road.

Oct 25, 2009 | 2005 Ford Ranger

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