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Prev Professional Automotive Repair Technical Discussions for September 18, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1996 Buick Skylark Limited 2.4L No Start, Stall, MIL Lamp on VIN: 1G4NJ52TXT
I need somebody to please explain to me how to diagnose this passlock system. We have a code P1629 which, according to the limited diagnostics, if it won't accept a relearn procedure then replace the PCM, which we did. Still won't start. Have what appear to be... Trouble codes: P1629 (fuel system disable)
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2000 Cadillac Eldorado ESC 4.6L ABS Module VIN: 1G6EL12Y5Y
Hello fellow techs. I have a Caddy problem that is driving me crazy. A coworker replaced the motor in this car and on job completion we have the "service steering system" and "service suspension" warnings flashing on the dash. Codes in the ABS are: C1234 LR wh...
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2001 Cadillac Seville SLS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KS54Y71
after start up the egr valve opens for about 10 seconds causing the car to run rough you can watch it open on the scan tool the valve isnt the problem i tried another thinking maybe it was weak it does not have excessive back pressure either Trouble codes: P0405
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2002 Cadillac DeVille DTS 4.6L theft system VIN: 1G6KF57912
PLEASE HELP !!! We have a 2002 Cadillac Deville DTS and when it came in it had a dead battery.So I replaced the battery and then we had a crank but no start. I pulled codes P0340 cam sensor ciruit,so I tested the cam sensor and it was not sending a signal to p...
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1970 Chevrolet Corvette 5.7L blower VIN: 194670S406
My grocery list is almost complete on my customers car. The blower motor is wide open with a solid 12v on it. However there is very little air blowing out the vents. I tried another blower motor to eliminate that. No success. My question is what to expect is r...
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2001 Chevrolet Blazer LS 4.3L Misfire VIN: 1GNDT13W51
Hi gang. This is the first time I have used the help request so forgive me if I am missing any pertinant info. This Blazer came in with a MIL on and a P0300 stored. No noticable misfire presant but when monitoring misfire counter on scan tool it shows a bad mi... Trouble codes: P0300 (Random Cylinder Misfire)
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2002 Chevrolet Astro LS 4.3L Poor Idle Quality, Surge, accelerate by itself VIN: 1GNDM19X72
Hello everyone, we have this van, has a weird problem, It will idle normally, however if I am at a stop, and take my foot off the brake, it will start to move like normal, but after a couple of seconds it will start to slowly speed up on it's own. It will actu... Trouble codes: P0507 (idle speed high)
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2003 Chevrolet Express 1500 5.3L headlights VIN: 1GCFG15T33
customer clomplaining that high beams flicker while driving at night with low beams on. extremly difficult to confirm or duplicate in the middle of the day. any input before i start digging into this one would be appreciated
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2004 Chevrolet Classic 2.2L No Start, THEFT LIGHT VIN: 1G1ND52F64
Hello I-ATN experts, Today's patient presented on the hook as a cranks but does not start. I noticed that the theft deterrent lamp was flashing. I scanned the computer and came up with B2960, Passlock Cylinder Data Incorrect. No other codes were present or pe... Trouble codes: B2960 (pass lock cylinder data incorrect)
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2005 Chevrolet Silverado 1500 4.8L vents VIN: 1GCEC14V85
I have this truck that has dual temmpature zone, the driver says the driver side will blow cold and then warm, while the passwenger side blows cold...If he shuts it off and restarts, it will get back to working for a while. I cannot duplicate this problem, hav...
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1991 Geo Storm 2+2 1.6L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: J81RF236XM
We've worked on this vehicle a few times and it's been a good car. Now I'm stumped. I had an unresponsive O2S with high CO so I changed it with a new Denso sensor. Now I get a great sweep. High to 825mv and low to about 200mv. The idle is rough, but there are ...
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1997 GMC Jimmy SL 4.3L injectors VIN: 1GDNDT13W8
was running when drove in had bad heads on old engine replaced engine got 70lbs fuel presser have spark have power to injectors just no pulse can run when primeing with squirt bottle but wont run on its own key switch is elec an wont turn off all the way n dom...
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1997 GMC Sonoma SLE 2.2L driveshaft VIN: 1GTCS1940V
This pickup came in with a seized u joint on the rear. Replace u joint and everything fell apart from there. Took vehicle for road test and at 35 - 40 kph there was a vibration that would make your stomach turn. Tried a new steady bearing ( has 2 piece shaft) ...
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1992 Pontiac Bonneville SSEi 3.8L digital display VIN: 1G2HY5213N
I was wandering if anyone new if there is a bad circuit in the cluster and were they go bad or whether you just have to replace it as an asm. thanks
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2002 Saturn L300 3.0L MIL Lamp on VIN: 1G8JW54R72
had code p1516 did the flow chart led to ecm replaced ecm with saturn new one it lasted 200 miles back again same code but different voltage on flow chart led to replace ecm again ohmed all wires from ecm to throttle all ok all grounds checked ok saturn gave m... Trouble codes: P1516 (command vs throttle position correlation)
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille 4.6L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on, multiple codes VIN: 1G6KD54Y2Y
well i guess we were all correct about those darn crank sensors.i replaced both of them after a little scratching of the old noggin wondering how in the heck am i ever going to get my big hands in such a tight spot.well i ended up taking a long 10 mm wratchet ... Trouble codes: P0300, P335, P0336, P0386.
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2005 Chevrolet Silverado 3500 6.0L alternator VIN: 1GBJK34U15
we replaced the computor and problem solved.we left the new battery and alternator in it though.We did find out that he boosted another truck the morning of.Some people never learn.
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2005 Chevrolet Express 1500 LS 5.3L rear ac lines VIN: 1GNFG15T75
Allright guys Lance from Ny hit it on the head Lift body to remove wasnt as bad as i thoght. about 2.0 hours total. thanks al for the help. (shop woudnt buy the dorman kit)
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1997 Pontiac Grand Am SE 3.1L gauges VIN: 1G2NE52M7Y
THANKS AGAIN FOR THE QUICK RESPONSES.INSTARUMENT CLUSTER WAS THE PROBLEM WE DID HAVE ONE KICKING AROUND HERE BUT THE THEFT DETERENT WOULDNT LET IT START BUT GAUGES SMOOTHED OUT AND QUIT TRYING TO JUMP OUT OF DASH PUT USED DASH IN RESET VATS AND ALL IS GOOD
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1998 Saturn SC2 1.9L delaid going into reverse VIN: 1G8ZH1270W
Thank you to all for the help. After connecting the gauge to the trans, saw the problem right away when out into reverse.It was the valve body. Replaced with a reman body.
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2002 Saturn SL 1.9L MIL Lamp on VIN: 1G82H52892
THANKS FOR THE REPLIES. THE CAR WAS FIXED ALL ALONG. THE CUSTOMER SAID THAT THEY GOT BAD GAS AND THAT CAUSED THE LIGHT TO COME ON. SO THANKS AGAIN TO ALL. Trouble codes: P0410 (secondary air system circiut problem).
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