1991 GMC K2500 "sierra jumped time" Questions

I have a 1993 GMC 1 ton 454 7.4 that jerks going down the road it feels like carborator back fire, it happens more often after it warms up and when I go between 45 & 60. the tack jumps around also

1991 GMC TBI 350 sierra stalls bad I have a 1991 GMC Sierra 350 5.7L. It runs really really rough on start up, when the weather is warner it runs better, not good, just better. I have replaced plugs, ...

...Sierra? There is no timing belt on this engine.It has a timing chain.There is no service interval for this.When it jumps time,breaks,or it is worn out then replace the chain and sprockets as a ...

Sierra. When the key is inserted and turned , the engine turns over but has a hard time starting, sometimes making a series of noises , sort of a kerthump . I have just had a new distributor installed

how do u set the timing on a 93 gmc sierra 1500 350 ? You can set the timing but the ecm, engine control module will reset it back to specs. So it useless to try. Good luck dont forget to rate you ...

have a 97 gmc sierra that the brake switch under the dash close to the floorboardmade a rapid clicking ,rattle noise a few times and now my brakelights don't work.the third light has always been ...

1996 gmc z71 firing getting fuel will not start I would guess you have a timing issue. Not sure of your cap and rotor style but check timing procedure. I've also seen a distributor jump teath.

truck stil want start got a new fuel pump, spark plugs, relay and the my truck will still not start. i have a 96 gmc truck did you check for spark to the plugs?...if you have spark check the timeing ...

sierra it will turn over it is geting fire but will not crank we have put new distribator,spark plugs and wires.we put computer it read nothing so put a new computer there is only 131000miles on truck

...sierra that done the same thing and it was the distributer gear stripped Pull one of the plug wires off and hold it close to the plug and get someone to try to start it. If you see blue fire spark ...