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Prev Professional Automotive Repair Technical Discussions for February 18, 2011
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Open Help Requests for GM
Help Request Answers
2003 Buick Rendezvous CXL 3.4L TCC lockup in 2nd VIN: 3G5DA03E13
This car came in on the hook - not moving, so not much pre-testing could be done. After overhaul this car has TCC lockup right on top of second gear and stays locked up until it downshifts out of 2nd when stopping. The TCC release pressure says NO as soon as i...
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2004 Cadillac CTS 3.6L Battery VIN: 1G6DM57714
I have a battery draw of about 2.6 a. The radio draws about one amp. The radio amp also has a draw of one amp. The other .5 is hvac module fuse, ecm/tcm fuse, driver dr mod fuse, rear dr mod fuse, trunk dr release fuse. I have unpluged the drivers dr mod, both...
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2005 Cadillac STS 3.6L timing chains VIN: 1G6DW67785
Hi Gang I have this STS here I am replacing the timing chains. I need the procedure to set up the proper timing I have Shop Key and they are very vague I set the timng as per the picture than i read down about stage 1 and stage 2. This has me confused I have ...
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1994 Chevrolet C1500 Cheyenne 5.7L Volt Guage VIN: 2GTEC19K4R
When the truck is at idle or under a load or even driving if the turn signals are turned on the volt gauge fluctuates back and forth. If you press the brake pedal the volt gauge goes down then comes back up, if the head lamps are turned on it dose the same. Al...
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2006 Chevrolet Silverado 1500 Hybrid 5.3L heat VIN: 1GCEK19TX6
This is a hybrid truck and it only has heat when electric motor is running and auxiliary pump comes on, When the gas motor is running the aux pump turns off and heat is lost. my question is should the aux pump run when the gas motor runs? ran thruogh Alldata t...
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2006 Chevrolet Impala LS 3.5L abs VIN: 2G1WB58K66
I gotta ask a quick question regarding a stored dtc #C0242 in this vehicle that doe not seem to relate to this vehicle. My OTC scan tool gave a quick "ABS module comm lost" but I can't find that DTC in Mitchell or Identifix. I googled it for fun and it came up...
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1966 GMC C15/C1500 Pickup 4.1L Front crank pulley VIN: 11001PD179
This truck came in with a bad harmonic balancer (coming apart) There is no bolt to retain the balancer on to the crank shaft nor does it look like one was there. The question is, is this normal and a press fit only? Just want to know if anyone has had experien...
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1995 GMC K3500 Sierra SL 5.7L Cuts out, Misfire, MIL Lamp on VIN: 2GTFK29K15
Hi, i am working on a 1995 GMC 3500 5.7 TBI auto trans. It has a repeated dtc 42. With set timing connector disconnected truck will run to 2300 rpms then start to misfire then pop back thru tbi. With Set timing connector together it will barely run at all. Ive... Trouble codes: 42 (IC control error)
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1995 GMC C1500 Suburban 5.7L No Start VIN: 1GKFK16K6S
hey all i have this vech towed to me has fuel pressure and no spark its has a new coil cap and rotor wires etc i cked for power to coil and showes 12v tryed a distributor and still no spark there is no pulse signel ecm was also replaced by cust i cked the grou...
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1995 GMC Safari 4.3L transmission VIN: 1GKEL19W1S
van towed in with transmission problem.we road tested and found it shifted fine in first gear .then slipped in 2nd and up we replaced the trans with a used transmission and filter road tested operated fine sent it back to customer and they drove it 1 week appr...
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1997 Oldsmobile Silhouette 3.4L MIL Lamp on VIN: 1GHDU06E8V
hello all and thanks in advance have this oldsmotrouble that customer had swapped an engine from 3.4 to a 3.1 out of a 96 grand prix. trying to get inspected and keeps setting p0341 code,checked signal out of sensor all way to ecm plug and has signal while run... Trouble codes: P0341 (Cmp sensor out of range)
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2002 Pontiac Grand Am SE 3.4L Hazard switch VIN: 1G2NF52E02
With car running there is no problem. With key OFF if you turn on hazard warning lights all lights and gauges in dash flash on and off and the power door locks lock and unlock with the flasher. We only had time to check a couple of grounds, G201 & G202 and bot...
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2005 Saturn Ion-1 2.2L security VIN: 1G8AL52F84
Please help,never saw this before vehicle came in for an inter. No start found tsb for ignition switch replaced with dealer part.problem still occured so we replaced with a new bcm no it wont relearn security.when you try to start it cranks for 2 seconds on th...
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Fixes & Summaries for GM
Fix/Summary Answers
2006 Cadillac STS 3.6L No Start VIN: 1G6DW67786
SPECIAL THANKS TO CARTER [...] EVEN THOUGH WE STARTED OUT ON THE WRONG FOOT.WE TESTED CIRCUITS FOR NUMEROUS HRS TO FIND THIS PROBLEM.FOUND PCM SIGNAL WIRE TO ECM CIRCUIT # 465 WAS BITTEN ALMOST THRU BY A MOUSE. WIRE WAS LOCATED IN RT FENDER NEXT TO BATTERY.IT... Trouble codes: P0627.
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2007 Chevrolet WORKHORSE 4.8L Excessive Emissions, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 5B4HPD2V17
THANKS TO ALL WHO REPLIED TO MY POST. ALL OF YOU HAD GREAT INFO. I INSTALLED STATIC STRAPS, CLEANED THE CONNECTORS AT THE PCM AND TAC MODULE. BOTH OF THESE COMPONENTS ARE NEAR THE LEFT WHEEL. I BELEIVE THAT WATER INTRUSION AND STATIC ELECTICTY WHERE THE PROBLE... Trouble codes: U0107 (Loss of communication to tac module).
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2000 GMC Safari SL 4.3L No Start VIN: 1GTDM19W0Y
i want to thank all who replied the fix ended up being a gm crank sensor and a repair harness from gm not cheap but van now running thanks mike Trouble codes: P336.
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2007 GMC Acadia SLT 3.6L MIL Lamp on VIN: 1GKEV33777
Thanks to those who replied -- all pointed to stretched timing chains as being the probable cause for the P0017. I have sent the owner to the dealer with a copy of the bulletin that I had overlooked during the diagnosis for warranty consideration. Trouble codes: P0017 (Crankshaft position to exhaust camshaft position correlation bank 1).
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