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Old 11-09-2018, 01:12 PM   #11
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Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 17,150
Thumbs up Re: GMC headlight upgrade issues

I have installed several head lights with the relays installed and all I'm going to say is no matter what anyone else says... always, always install the relays.

The relays will take the amps off the whole system and make everything last longer. Even if you install a brand name wiring harness install the relays.
1971 LWB Custom, 6.0LS & 4L80E, GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71

Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour

Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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