My Yukon will crank but won’t start. We’ve changed the fuel pump, ECM, crank shaft, camshaft, throttle pedal sensor, throttle body sensor, MAP sensor, injectors & fuel rail. Spark plugs are good. It doesn’t have a fuel regulator, fuel module or fuel filter. Theres a fuel module and fuel filter on the pump but no on the body or anywhere else. It has half a tank of gas so it’s not out of gas. All fuses and relays have been checked and are good. Battery is good. Still gives codes stating the engine is hot reduce power and turn off AC. We are at a lost as to why it won’t start. It will start then die with starting fluid but that is it. It has compression, spark and fuel but still won’t start. What else could we check or what could the problem be?
How long has your 2007 GMC Yukon XL 1500 had this problem?
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Hello, that's a whole lot of parts to guess at for replacement!
Maybe some troubleshooting is in order to determine what is going on is in order?
Hands on testing is needed to see what is happening.
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If the only clue you have are trouble codes related to engine temperature, have you checked this sensor and the wiring?
Clearly something is telling the engine's processor that it's not a good idea for the engine to run - so the key is to find out what that is.
