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2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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bd1703
Novice
Jan 30, 2013, 7:04 AM
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2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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Long story short, I got hosed over a nice 2003 chev. tb in september this year. I drove for 250 miles and the tranny went out!
Anyways, my fault for not checking it out b4. I flipped the bill and got a rebuild from a quality place for about 1700 bucks (way better than complete replace)
The transmission works fine but the check engine soon light keeps coming on. I have had it back to the place of rebuild twice (life time warranty on rebuild) and they have not found any issues. I got the truck back sunday (2 days ago) drove great for about 300 miles and the light is back on.
Any ideaS? i'm thinking electrical but that is as much as i can gather...
info about rebuild: the transmission needed complete rebuild and also had to replace internal wiring harness (which is usually intact for a rebuild)
thanks for any help!
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Hammer Time
Ultimate Carjunky
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Jan 30, 2013, 7:08 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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What is the exact code number being set?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bd1703
Novice
Jan 30, 2013, 7:09 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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torque converter -
shift timing circuit -
clutch selonoid circuit -
all have been replaced...
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Hammer Time
Ultimate Carjunky
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Jan 30, 2013, 7:39 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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No, I exact need numbers, not someone's interpretation
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Hammer Time
Ultimate Carjunky
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Jan 30, 2013, 8:33 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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The P0785 is an open or short to power or ground in the 3-2 shift solenoid circuit and apparently they haven't found that yet.
The P1864 doesn't even apply to this vehicle so there is likely some error in the reading of that code..
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Jan 30, 2013, 8:34 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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P0785 is a 3-2 shift solenoid circuit fault. Shouldn't be to hard to diagnose that problem, because it indicates and open or short in the 3-2 shift solenoid circuit.
You need to take it back and have them troubleshoot and resolve the issue.
P1864 is not a valid code. Doesn't exist.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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bd1703
Novice
Jan 30, 2013, 9:01 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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i will double check on my diagnostic when i get home tonight.
2nd problem, the two times i have brought it back, my battery died and SES light was off when i got there, each time, I was told that the computer did not have any codes. Problem is, I have to leave the vehicle there when the work and communicate over phone. I already know that i should make sure to drive it there next time i have an opportunity. again, i will double check codes and repost, i know the p0785 is for sure
what could happen if p0785 is not resolved???
(This post was edited by bd1703 on Jan 30, 2013, 9:06 AM)
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Hammer Time
Ultimate Carjunky
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Jan 30, 2013, 9:34 AM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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That will cause serious shifting problem. That is a shift solenoid shorted out. It feasibly could even take out the control module.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bd1703
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Jan 30, 2013, 2:33 PM
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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ok,
i hooked it up and have the following codes:
p0785
p0740
p1860
thank you sorry again about confusion.
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Hammer Time
Ultimate Carjunky
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Jan 30, 2013, 3:14 PM
Post #11 of 12
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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You have electrical issues that need to be diagnosed properly.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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bd1703
Novice
Jan 31, 2013, 7:08 AM
Post #12 of 12
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Re: 2003 Chevy Trailblazer LT - 5.3 v8 - codes???
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electrical issues just specific to transmission or entire vehicle?
would the auto start that was installed by previous owner have anything to do with electical problems?
thanks again,
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