Question about GMC C1500
1991 gmc 3/4 truck
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: 4wd not engaging
Is it a two wire actuator or a three wire actuator? The two wire ones are pretty unreliable. that is why Chevrolet converter them to the three wire. Check for power and ground on the two wire in 4wd. For the three is should have one ground wire, one wire that is hot in 4wd, and one wire that is hot in 2wd.
Posted on Mar 02, 2009
You only have a few choices. Buy a repair manual at a parts store. Go online and google wiring for your truck and you might find it posted for free. Go to Alldata .com and pay for the info you need or ask nicely at a repair shop or dealer that can print off the required info.
Posted on Mar 12, 2009
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