Dorman 600-490 4WD Actuator Compatible with Select Chevrolet/GMC Models

Fits perfect on my 88 k 1500. Relatively easy to install. Instructions were very helpful. Brought my non-functioning four-wheel drive back to life. In the long term is a great investment knowing that the newer style actuator is less expensive than the older style and quicker to activate. Perfect fit.

Very well written instructions that include wiring diagrams to show exactly where the one wire needs to be spliced. Very easy to follow the instructions and install the kit. Worked exactly as expected and fixed my 4WD issue.

Fits and works great in my 1989 k1500. 20 minute install been working great for months now. Thanks, Dorman for putting this kit together and helping us keep these trucks going.

HAD PRODUCT IN TIMELY MANNER!

May have just gotten unlucky, requested for a replacement, we'll see how it goes. Wiring does work and it was pretty straight forward.

Works well once installed. Fit my '92 k1500 short box. Have to hardwire to the power from the transfer case. If I could do it, you can do it!

Receiving connector on truck side to the old thermal actuator is different and won’t work with this harness in the kit. I had to take the old one out and connect it to the new wiring harness. I wish kit came with teflon tape and three zip ties. Besides that Great product. Fast engagement of 4x4 when done and done. Took some wiring work since I had to reuse old connector and I don’t know what is blue wire and black one. On Old thermal both are the same color. Truck side I had to figure out which to blue and which to black since I had to reuse old connector.

Wish the unit was metal rather than plastic. I used Teflon tape on the threads. Just snug it tight, don't overtorque it. I followed other reviewers suggestions and ran the wire to the "keyed hot" lug on the convenience center inside the cab. Works very well.