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I have a 1999 GMC yukon with 350 ci., It want start.

Sent to Car Experts June 26, 2006 10:59 p.m.

I have a 1999 GMC yukon with 350 ci., It want start. motor turns fine. Have replaced alternator, coil, fuel pump, plugs, the engine does not get fire at the coil nor spark plugs. What could be some possibilities.

Optional Information:
1999 GMC yukon 350

Already Tried:
coil,fuelpump, alternator, new ignation switch,

Customer (name blocked for privacy)

Status: Closed Value: $10

Answer
June 26, 2006 11:11 p.m. (11 minutes and 40 seconds later)

ACCEPTED

You may have a faulty crankshaft position sensor. It is located by the crankshaft pulley. This sensor is what sends the siganl to the coil to fire. GM has had some proablems with these sensors. Does your truck have a tachometer? If so does it move when cranking?

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Reply
Sent June 27, 2006 11:10 p.m. (23 hours and 59 minutes later)

Relist: I still need help.
I have a 1999 GMC yukon with 350 ci engine. It will not start. It dosen't get any fire. I've changed the Fuel pump, coil, crank sensor, ignition switch, new plugs,alternator, now I have ordered a new PCM. what else could be the problem??

Edited by Customer (name blocked for privacy) on June 29 2006 at 10:22pm

Customer (name blocked for privacy)

Reply
Sent June 29, 2006 10:23 p.m. (1 day and 23 hours later)

Relist: I still need help.
Relist: I still need help.
I have a 1999 GMC yukon with 350 ci engine. It will not start. It dosen't get any fire. I've changed the Fuel pump, coil, crank sensor, ignition switch, new plugs,alternator, now I have ordered a new PCM. what else could be the problem??

Customer (name blocked for privacy)

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