SOURCE: what will cause a 5.7 2002 gmc savanna not to have
on that engine the crankshaft sensor sends a signal to the pcm to fire the coil the pcm then sends a ground pulse signal to the coil to fire if you check for 12 volts at the coil and it is there with the key turned to run. then use a 12 volt test light hooked up the alagator clip on the positive battery post and touch the probe end of the test light to the pulsing wire at the coil electrical connector white and black wire during cranking the test light should flash.also test pink wire at coil connector for 12 volt with dvom for power.if no 12 volt check fuses with the test light to ground on injector 1 fuse. also ohms test the coil wire no more than 1000 ohms per inch . also check ground at ign module with the test light .Hope this helps thunder boltz please post rating
SOURCE: turn signal relay location for a 2004 gmc savanna 2500 van
It is a "Turn Signal/Hazard Flasher" Module located above the passengers feet. It will be mounted with the plug or connector facing away from the Passenger. Yours will have 13 wires going to it. about a 3"x4"x1.5" thick black or Grey box depending on your options believe it or not. Try turning on the turn signals OR the flashers if either work and listen for it to click. usually the Hazard switch gets hung up on these and requires you working it quickly and aggressivly 20-30 times to get them working again. the switch that is. good luck!
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