Where are the VAC hoses on a GMC Jimmy?
CHECK all vac hoses from the intake to reservior (in drivers front fender) to the firewall switch, to the actuator under the battery (5/32 small and 7/32 larger). Note that both front axles CVs always turn as well as front drive shaft.
Where is the actuator on a GMC Jimmy 4WD?
1. Check the vac hoses from the untake over to the reservior and T off to the actuator under the battery tray. 2. Chack the actuator (crawl under the pass side front) by looking /listening to see it the cable pulls the axle coupler. 3.
How can I tell if my GMC Jimmy 4WD is coupled?
Chack the actuator (crawl under the pass side front) by looking /listening to see it the cable pulls the axle coupler. 3. Check the front axle coupler sensor (wires to it) by unscrewing and pushing the ball in) which tells the TCCM or 4wd computer that the axle is coupled for all 4wd modes.
Can a GMC Jimmy 4WD be used off road?
No, 4hi is only to be used off road where the wheels can slip and not bind up the drive train. Snow is OK too. Its 20 years old so will leak at the seals. Change the transfer case fluid too.
Where is the VAC line on a GMC Jimmy 4WD?
Vac line runs from the intake by the PCV hose, over to the drivers side fender/firewall where it Ts to the vac reservior can in the fender and to the 4wd and heater (hard plastic one). Then to that switch on the firewall so check all lines and replace 5/32 (and 7/32 for larger line) vac line.
1. Check the vac hoses from the untake over to the reservior and T off to the actuator under the battery tray. 2. Chack the actuator (crawl under the pass side front) by looking /listening to see it the cable pulls the axle coupler. 3.
Is there a problem with my GMC Jimmy 4WD?
If you have 4 button Autotrac the transfer cases sometimes have clutch problems and use special blue syn fluid to smooth out. The Bang comes going back to 2WD. When going into 4WD, you hear the clicking of the relays and feel it shift and hear a low whine/rumble. 4LO seems to be working as advertised.
How does transfer case work on GMC Jimmy 4WD?
For 4Lo the transfer case has an encoder motor that is on the transfer case that engages a lower gear when you stop, put trans in neutral and push 4 lo and a clunk is heard. Again a sensor on the transfer case to tell TCCM it is engaged. Hope that wasn’t too confusing.