I have a 1993 GMC K1500 that the 4 wheel drive will not work. Shifter moves to low or high but the truck does not shift. The indicator light will work sometimes

SOURCE: 4 wheel drive on my jimmy won't engage

try disconecting the battery to reset service light may not solve the problem but should allow u to put truck into 4 wheel

Marvin

• 85242 Answers
• Posted on Mar 26, 2009

SOURCE: 1993 GMC 1500 4x4 poor shifting

this may be due to a poor connection at the vehicle speed sensor on the transmission, pull the connector off the sensor and clean it with contact cleaner, if the problem persists replace the speed sensor. there are 2 diff ones here is a picture of the most common one for an auto trans.

SOURCE: wont shift back from 4x4 low, to 2x2

I also have a 2002 Envoy. Shifting to and from 4wh and 4wa can be done on the fly but shifting to 4wL has to be done stoped and while in neutral. Try that. Otherwise I'm afraid its a new computer for you. Its located under the left rear seat and you need a loan for one.

SOURCE: 1995 gmc sierra 4x4 shifter wont go in 4 wheel drive.

my name is michael. You said it will go into 4 low but not into 4 hi. Have you lifted the truck to see if it is operational? Does your 4x4 light come on? Does it grind into either 4 hi or low? And one thing, has anyone ever taken the axle out on the right hand side? Please feel free to email me at [email protected].

SOURCE: I have a 2000 GMC sierra 2500 truck. The guy I

-----check possible tps [throttle position sensor ]circuit for damage or faulty sensor----if good check the fuses and trans harness for shorts damage or disconnection,check o2 sensors wiring possible ground to exhaust ,or internal leak 2nd gear apply circuit[servo assembly or 1-2 accumulator] or poor pump pressure