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Prev Professional Automotive Repair Technical Discussions for September 29, 2014
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Open Help Requests for GM
Help Request Answers
1994 Buick Roadmaster Limited 5.7L Hesitation, Misfire VIN: 1G4BT52P9R
Car was brought in as a no start. Found very weak to no spark. Customer just brought the distributor on his own and plugs and wires. P&W are ac delco. Customer bought a Accel Brand distributor. He declined the AC delco. Installed all parts and engine started u...
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2005 Cadillac SRX 3.6L right cylinder head VIN: 1GYEE63705
Good afternoon to all. I have this 2005 Cadillac Srx with the 3.6 v6.it has a loud tick / rattle noise from the right cylinder head (not timing chain). after pulling valve cover off I discovered this thing is starving for oil on the right side. lifters aren't ...
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2010 Cadillac CTS 3.0L Signals VIN: 1G6DC5EG3A
Ordered BCM and installed. Connected to BCM with Tech2 and performed Setup New Module. Copied keys over successfully and now vehicle will not start, signals work but way too quick. Double checked everything. No security issues in theft module. Checked switch ...
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2000 Chevrolet S10 4.3L MIL Lamp on VIN: 1GCCS19W4Y
This S-10 had a junk-yard engine and ECM replaced at some point in the past, judging by the blue marking numbers. The ECM ID number is correct for 99-00 S-10 with 4.3 I did have a P325 knock sensor code, and thanks to this website found that the knock sensor ... Trouble codes: P0160, P0146, P0325
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2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK231X4
Requesting help from the Duramax experts. I would like to know if there is a easy way of checking the EGR Cooler for being plugged. Not sure if pulling a vacuum on the EGR Valve while opening the EGR Valve Throttle Plate and looking for engine stumble will wo... Trouble codes: P0380 (p0404-), P0404
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2002 GMC C7500 Topkick C7H042 8.1L code P1663 VIN: 1GDM7H1E72
DTC P1663 change engine oil lamp control circuit? I cannot find any diagnostic information on this code. Has anyone seen this code before and if so any suggestions on where to begin to fix it. I cleared the code and it came right back. Any help will be appreci... Trouble codes: P1663 (Change engine oil lamp control circuit.)
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2002 GMC Sonoma SL 2.2L timing chain tensioner VIN: 1GTCS19532
chevy techs: I replaced the timing chain and tensioner on this 2.2 chevy engine 1 year ago because the tensioner came apart, and the chain ended up breaking. ok, simple enough. pulled it down, replaced chain, tensioner assembly, and made sure oil passage in fr...
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Fixes & Summaries for GM
Fix/Summary Answers
1985 Cadillac Eldorado 4.1L Surge VIN: 1G6EL5783F
THANKS TO ALL THAT SUGGESTED THE IDLE STEPPER MOTOR. WE DID PULL THE DIDTRIBUTER AND THE GEAR WAS GOOD. WENT THROUGH ALL SENSORS FOR PROPER RESISTANCE, SET THE BASE IDLE AND TIMING. EVEN WITH THE NEW STEPPER MOTOR WE STILL HAD TO BUMP THE BASE IDLE UP ABOVE SP...
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2007 Cadillac SRX 4.6L block heater VIN: 1GYEE63A77
I put an oil pan heater on this unit. Looking at alldata, if I could get a factory heater, the hole at the LH rear of the bell housing where the "contact" heater goes does look reasonably accessible, though. Thanks to everyone for the replies.
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1992 Chevrolet Blazer Cheyenne 5.7L speedometer VIN: 1GNEK18K1N
After many hours looking for the problem we finally found it the wire going to the neutral safety switch was shorted to ground replaced switch and ran new wire and problem was solved thanks for all the insight on this problem fellow techs !
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1998 Chevrolet K2500 Cheyenne 5.7L passlock VIN: 1GCGK29R8W
After exhausting the OEM diagnostic chart for testing the passlock module, I confirmed with certainty that the passlock module was bad and ordered one. Today I installed it, along with a resistor to bypass the passlock sensor, and then performed the 30 minute ...
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1999 Chevrolet Express 3500 5.7L ECM Fuse 1 VIN: 1GBJG31R8X
As many of you stated the oxygen sensors were shorting. What threw me in a loop was it being more than 1 oxygen sensor being shorted and the customer saying the welding was done over a month ago. Replaced all oxygen sensors and the fuse stopped blowing. Thank...
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2003 Chevrolet Suburban 1500 LT 5.3L rear blower fan VIN: 1GNFK16ZX3
Hi people. I had to punt on this one to the dealer as I do not own a scope at this time to test the purple wire and check for sine wave. The customer stated that they only wanted to spend $200.00 to fix the rear hvac problem. I tried used parts that include...
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2010 Chevrolet Express 2500 4.8L Misfire, MIL Lamp on VIN: 1GCZGFBA0A
THANK YOU ALL,SOME VERY GOOD STUFF AND VERY EDUCATIONAL FOR THIS MODEL , AFTER TAKING A STEP BACK AND A FRESH LOOK AND A SECOND COMPRESSION TEST , TEST REVEAL #1 CYL LOWER THAN ALL OTHER CYL,AND MISFIRE COUNT GOES AWAY AT HIGHER RPM AND COME BACK AT IDLE ALWAY... Trouble codes: P0121, P0300, P0172, P0175, P0301.
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2012 Chevrolet Silverado 2500 HD LT 6.6L MIL Lamp on VIN: 1GC1KXC8XC
Well the vehicle is back on the road and here's what I can tell you about it. In review, the problem we were having was that that after the repairs were done the permanent, or Mode A, service code was still present as was the warning message. We ran the Reduct... Trouble codes: P20B9.
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1999 Pontiac Sunfire GT 2.4L ets,abs,temp,anti theft, VIN: 1G2JD12T5X
Thanks again for everyone's help...We have found the problem to be a bad ground underneath the battery tray...thanks again
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