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Prev Professional Automotive Repair Technical Discussions for October 25, 2011
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Open Help Requests for GM
Help Request Answers
1992 Cadillac Seville STS 4.9L fuel enable VIN: 1G6KY53B7N
Vehicle sometimes will start and die-"starting system disabled due to theft deterent" comes up on info center.sometimes the car will start and run-when this happens a "theft deterent problem,car may not restart" comes up on info center.Not finding any matches ...
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2004 Cadillac SRX 4.6L MIL Lamp on VIN: 1GYDE63A04
Need help on this Cadi... cust states mil on with code p0174 bank 2 lean. verified code, found vacuum leak at booster hose -intake side-. also the b1s1 and b2s1 are both dead reading .037 volts and not moving at all, no codes for o2's. note both after cat o2's... Trouble codes: P0174 (Bank 2 lean)
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1967 Chevrolet Corvette 7.0L Misfire VIN: 194677S105
This will be a long disertation. Feel free to email me any questions or suggestions to help diagnose this problem. This 427 390 hp engine will blubber and pop out the side pipes at 5200 rpm, no matter whether driving or under no load in the shop. When driving,...
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1988 Chevrolet C1500 Silverado 5.7L Misfire VIN: 1GCDC14K6J
This vehicle came in with a random cylinder misfire just off idle while under load. All cylinders show kVs around 10-12 with a normal pattern on all cylinders except one. When a cylinder is misfiring the kVs remain the same but it just displays a shorted patte...
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2001 Chevrolet Impala LS 3.8L No Start VIN: 2G1WH55K31
Hi : everyone: about three weeks ago this car came in for battery discharge problem, the reason was ignition switch was staying on because of bad cylinder. A few times he recharged the battery and start the car. Yesterday he towed the car in becaus she would n... Trouble codes: U1016 (Comunication lost)
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2003 Chevrolet Blazer LS 4.3L Radio VIN: 1GNDT13X43
Had a aftermarket alarm system(removed). If you turn the key halfway off the transmission range display turns on. Also noticed the ignition power mode never displays running it is either off or cranking(even when it is not). The transmission and radio light up...
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2005 Chevrolet Trailblazer EXT 4.2L Oil VIN: 1GNDT13S15
Customer bought vehicle about 1 year ago and it used about 3/4 quart of oil between changes and about a month ago it started using more oil. We changed oil and it has since used about 3 quarts for 1000 miles. I cant find a pcv so i was wondering if anyone else...
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2007 Chevrolet Impala LS 3.5L MIL Lamp on VIN: 2G1WT58N87
Hey guys i dont know about this system so i really dont know where to start,i can power the air injection and the pump runs,and that is about as far i can go.any help would be appreciated. Trouble codes: 411 (Secoundary air injection system in correct flow)
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2007 Chevrolet Silverado 2500 HD Classic WT 6.0L high idle VIN: 1GCHC24K97
After charging battery and starting vehicle found problems. vehicle always starts fine. I do not believe that there are any fuel pump related concerns. However, the idle was up and down. Noticed fuel trim high - long term 16% at idle. Removed throttle actuator... Trouble codes: P0507 (high idle detected), P060D
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2008 Chevrolet Impala LT 3.5L MIL Lamp on VIN: 2G1WT58M08
Hello fellow techs. This car came to me for a check engine light concern. I activated the air pump with my snap on verus and the pump did not run. Found no output from the air pump relay. Replaced the relay and then was able to activate the pump with the scann... Trouble codes: P2440 (Air solenoid remains open)
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1990 GMC C1500 Sierra 5.0L No Start VIN: 2GTEC14H9L
working on a '90 gmc 5.0L came in with a no start. I checked fuel press and have about 12 psi for a sec. when key is turned on. no fuel pressure cranking. i quick jumped pwr to fp test fuse to rule out oil pres swith and fp ran but had not inj pulse. check spa...
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2001 GMC Sierra 3500 SL 6.6L starter VIN: 1GTJK39101
Thanks in advance we repaired this truck it sat outside the shop over night and shop owner heard truck outside trying too start, no one was in it. he pulled starter relay next day as day was cooling down heard truck start too crank over again we pulled the cra...
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2004 Pontiac Grand Prix GT1 3.8L No Start VIN: 2G2WP54214
this car will run and idle normally but if you shut it off it will not start and will lose injector pulse and spark. This happens every now and then regardless if hot or cold. Replaced the crank sensor and same problem. Checked the inputs and outputs on ICM an...
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2006 Pontiac G6 2.4L Surge, Stall, Power reduced VIN: 1G2Z1555B2
hello this G6 will intermentaly cut go into tranny limp mode and the IPC will flash gauges will drop and error will read on the odomoter i havent had much time to look at there was a list of codes that where in it and those codes were in the pcm only. I do kno... Trouble codes: P0976 (2-3 SHIFT solinod LOW), U0073, P0700, P2544
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2007 Pontiac Grand Prix GXP 5.3L compressor VIN: 2G2WC55C67
this customer was in for another problem and then said by the way, my a.c. comes on when i use the auto hvac. when requesting the auto, and set the temp to 89 degrees the snow flake does come on and when monitoring the system it is being commanded on. i let th...
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Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac SRX 3.6L Ebcm VIN: 1G1YDE6375
Thank you all for your time and suggestions. As most of you said, a used module could not be used again. After trying one more and attemting to only calibrate the bps, it would shut down the process because of differant vin. After installing new module,(900.00...
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2007 Cadillac Escalade 6.2L MIL Lamp on, Reduced power mode VIN: 1GYFK63857
This vehicle is fixed! Stephen from Florida was 100% correct! A section of wiring harness was rubbing against the front driveshaft yoke at the transfer case end. This explains why it only acted up when moving. The two wires that were hitting were not direc... Trouble codes: P2101 (Throttle actuator position performance), P0341 (Camshaft position sensor performance).
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1991 Chevrolet C1500 Silverado 5.0L Hesitation, Surge, Stall VIN: 1GCDC14HXM
hey thanks for all of the help from everyone,the vehicle had a bad fuel pump replaced it and that took care of the problem,thanks again,for everything.
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2000 Chevrolet Express 3500 5.7L No Start VIN: 1GDJG31R9Y
Most people said it was most likely a fuel delivery problem. I replaced the fuel filter and this helped some what but not 100 percent. This has a full tank of fuel and the tank has to be removed so we opted to wait until it needs gas again before we replace th...
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2005 Chevrolet Equinox LT 3.4L MIL Lamp on VIN: 2CNDL23F35
WE CHECKED ALL WIRING AGAIN. DISCONNECTED BATTERY AND LET SIT THEN RE-CONNECT BATTERY AND ROAD TESTED. SO FAR THE LIGHT HAS NOT COME BACK ON. THE CUSTOMER WOULD START CAR AND DRIVE AT 100KPH WITH IN MINUTES OF STARTING AND THIS WAS CAUSIMG THE INSUFFICIENT SWI... Trouble codes: P1133 (Insufficiant switching).
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2001 GMC Yukon SLT 5.3L Noise VIN: 1GKEK13T01
Well, this one is fixed and it turns out that my first instinct was correct. It WAS the FPR. As previously stated, i replaced it 5 times with Factory AC Delco units, 2 from the dealer and 3 from an aftermarket supplier. All 5 AC Delco units made noise. What ...
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1986 Pontiac Firebird Trans Am 5.0L No Start VIN: 1G2FW87F4G
Thank-you for all the help.we did check resistance on the injectors and found them ok,also checked all grounds again.we suspect pcm,however the customer does'nt want to proceed at this time.I think he will in the spring.thanx to all again Trouble codes: 22 (tps too low), 21 (tps too high), 15 (coolant temp too high), 34 (maf too low), 44 (lean exhaust).
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2006 Pontiac G6 GT 3.5L Remote Door Locks VIN: 1G2ZH55826
We tried most of the ideas that the group gave us. The customer is going to take the transmitters to be tested at the dealer and if they test correctly have the dealer run a Tech 2 scan on the car to check that the module is getting the correct signals. Unfo...
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1999 Saturn SW2 1.9L Slow to refuel VIN: 1G8ZJ8279X
Hi there and thanks for the help. This one had no evap codes and at first, i could blow up through the vent valve which mounts to the filler pipe in a box near the fill cap. With a little manipulation, we found that the vent valve would be sealed off solid a...
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