Question about 1998 GMC Jimmy
I have a 1998 GMC Jimmy...it does NOT have automatic 4WD, the button switches are 2WD, 4Hi and 4Low.
Sometimes no indicator lights are light. At other times, the 2WD light is lit. Regardless of a light or not, the buttons do nothing. No light changes, no transmission noises/sounds of any kind. I replaced the switch and the same problem still exists.
Depending on which transfer case you have, there will either be an electronic actuator or a vacuum actuator that engages the front differential. On the backside of the transfercase there should be a round metal tag bolted to the case. It will have a number on it that starts with NP. Either an NP241, NP246, etc. This will tell you which case you have. Grab a repair manual at an autoparts shop, and it will show you the location of the actuator for the specific case you have. If you have a vacuum actuator, check the vacuum lines going to it first before replacing it. Twelve years does a number on rubber vac lines under a vehicle. You may just have a leak in one.
Posted on May 28, 2010
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Posted on Jan 02, 2017
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