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Andy4639 · 07-18-2014, 03:03 PM

Before upgrading the lights on our truck you should install a relay kit to the factory lights and see afterwards if you even need the upgraded lights.
Another thing you can do is check the connections on the head lights and see how much voltage you are getting to your lights. if you upgrade to the relays you will get the max voltage and amps to them.

07-18-2014, 03:03 PM	#7
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Aftermarket Headlights for GMC Before upgrading the lights on our truck you should install a relay kit to the factory lights and see afterwards if you even need the upgraded lights. Another thing you can do is check the connections on the head lights and see how much voltage you are getting to your lights. if you upgrade to the relays you will get the max voltage and amps to them. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com 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 http://upstategmtrucks.com/ 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.