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Gary, GMC Technician
Category: GM
Satisfied Customers: 16766
Experience:  15 years gm master tech/15 years ASE master tech
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I have a 2004 envoy with 180k just picked it up was told it

Customer Question

I have a 2004 envoy with 180k just picked it up was told it needed an engine I put a batt on her and it almost started sounds like its out of time
Submitted: 1 year ago.
Category: GM
Expert:  Gary replied 1 year ago.

I am sorry for the long wait

is this a 6 or 8 cylinder engine in this ?

Expert:  Gary replied 1 year ago.

the odds are and is very common for those engines is the timing chain to break or jump time which would cause the no start and the engine sounding like it is out of time

when these timing chains do this the damage that can be done to the inside of the engine it is cheaper to install another used engine or a new or reman engine complete

they are usually not worth fixing when this happens

Customer: replied 1 year ago.
its a 4.2
should i try a crank sensor
Expert:  Gary replied 1 year ago.

i would do a compression test first as these are so common for timing chain issues

if all 6 cylinders compression is under 125 ish the chain has jumped

Customer: replied 1 year ago.
if not are we good
what is normal comp on this motor
Expert:  Gary replied 1 year ago.

all 6 cylinders should be well over 125

Customer: replied 1 year ago.
ok will check in am
Expert:  Gary replied 1 year ago.

sounds good

you can always get me back for FREE any time for any follow up even after you rate us here at Justanswer as i do not get credit for my work until you rate us here