I searched for "code", "code 36" and "36" but didn't find anything... I started my truck adn ran it for two days with no problem, but yesterday I got a code "36" which according to Chevythunder.com (the best site in the world) is: Code 36- This code is related to the burn off relay failure. The ecm has failed to detect 12V on the black wire going back to ecm pin D12, when the relay is not energized. The most likely cause is a open black wire or orange power wire going back to a fusible link to the battery. If this code is present with codes 33 and 34, again as mentioned before, check all the connections and wiring. I checked the wires, wiggled this, wiggled that...everything looked good, so I cleared the code. The truck started, but just barely (I think this is an unrelated issue with fuel) and viola no light...Becuase I beleive the MAF Burnoff relay only comes into play once in a while, I started the truck and truned it off almost 20 times in a row...still no light. So, here is my question(s). 1) Does the MAF burn off circut only turn on once in a while? what triggers it? 2) Anybody else ever get a code 36? Did you replace the relay?