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Prev Professional Automotive Repair Technical Discussions for January 11, 2010
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Open Help Requests for GM
Help Request Answers
1993 Buick Park Avenue 3.8L interior VIN: 1G4CW53L3P
Occasionally vehicle has a smell of hot candle wax burning in interior at traffic stops after 15 minuets never at cold start or before 15m. Had this occur last summer too, thinking it was from leaking oil on exhaust. Eng/tr replaced Nov 2009 for failing transm...
1997 Cadillac DeVille 4.6L Mechanical VIN: 1G6KD54Y3W
After pressurer testing and resurfacing heads. We installed new gaskets. Engine started up right a way but was a little rough. I told my tech to bad it out of shop and let it idle so the lifter could pump up.He backed it out ,than shut it off and told me the o...
2002 Cadillac Escalade 6.0L Drive-axles VIN: 1GYEK63N02
thanks in advance for any help on this. the front differential on this vehicle is probably junk, side brg retainer is broken and diff is noisy, costomer has no money so my question here is, will damage occure to transfer case if i remove front drive shaft and ...
2003 Cadillac CTS 3.2L oil pressure VIN: 1G6DM57N73
Vehicle died on highway for customer when message came up low oil pressre. Tow company added over 3 quarts of oil. Car started up and the customer brought it in for service thinking he only had a major oil leak problem. Valve cover gaskets leaking badly so i p...
1991 Chevrolet K1500 Silverado 4.3L Hesitation, Cuts out VIN: 2GCEK14Z2M
Customer complaining currently of intermittent stalling at intersections. There is also a hesitation. Checked fuel pressure which is good. Spark is good. Runs good on gradual throttle. No stored codes.Does anyone have any suggestion on what else could be causi...
1996 Chevrolet C60 Kodiak C6H042 6.0L Poor Idle Quality, Stall VIN: 1GBJ6H1P1T
vehicle has everything new.right side injector only fires on cranking will not fire in run mode.replaced with another injector in case new one was bad no change.found no signal coming from wire from d16 connecter replaced wire with whole new one.no change repl...
1997 Chevrolet K1500 Silverado 5.0L hyd. lifters VIN: 1GECK14M0V
Good day and thank you in advance for your assistance, My client had just purchased this truck at a very reasonable price, even though he knew about the lifter noise. It has had an intake gasket installed reciently. I removered the valve covers and ran the e...
2002 Chevrolet Suburban 1500 LT 5.3L odor VIN: 3GNFK16Z92
this flex fuel vehicle has no running problems or starting problems. after the vehicle sits for awhile(not running) it has a bad gas smell inside vehicle that can be very strong. no codes are present. performed the 20 minute evaporative emessions tests with sc...
2002 Chevrolet Silverado 3500 6.6L shifts into neutral VIN: 1GCJK39152
speedometer would not work causing to shift into neutral shift indicater flashing replaced all speed sencers and shift soloind on side of transmission transmission shifts fine but but every now and then it shifts into neutral driving down the road drop it down...
2003 Chevrolet Tahoe LS 5.3L Hesitation VIN: 1GNEK13Z33
I am looking for anybody that has had this code po178 come up before since I do not understand the FCS system well or others that do. Is the sensor in the fuel system/pump or is it regulated by the a/f sensors and is this the actual failure with this code. An... Trouble codes: P0178
2003 Chevrolet S10 2.2L No Start VIN: 1GCCS14H73
Hello every tech. I been working on the pick up pass few days, coudn't figure it out the ground wire from the Fuel Pump connector how it work,first of all the owner vehicle though, it was a fuel pump didn't give any fuel from the pump, then went ahead replace ...
2003 Chevrolet Silverado 1500 5.3L Differential VIN: 6981455515
Hi my question is approx 1 month prior an 03 silverodo 4wd 5.3l came into our shop and had an axle seal replace due to it leaking. The 4wd was not checked at this time and left the shop. once the snow came the customer noticed the 4wd was inoperative and retur...
2004 Chevrolet Silverado 1500 5.3L steering pressure VIN: 1GCEK19T84
Hello everyone i have this o4 chevy truck that came in today and the customer said he has a hard time turning the steering wheel left. I took the car out for test drive and it is very stiff to turn left but turning right is ok. It does not seem to make a diffe...
2004 Chevrolet Silverado 1500 5.3L speedo cluster VIN: 1GCHC24U84
speedo cluster on this truck sometimes does not work for what the customer states. I have driven the truck about 50 miles in the last few days and have not got it to not work. The only thing i notice is it seems that the speedo and tach needles when you start ...
2005 Chevrolet Uplander LS 3.5L instrument cluster bulbs VIN: 1GNDV23L55
I hate to open a help request for this, but I really have no other choice. I have this Uplander that has two bulbs blown in the instrument cluster. I am searching everywhere for these bulbs or atleast a part number and getting nowhere. I've called three Chevy ...
2007 Chevrolet Silverado 2500 HD Classic LT 6.0L Misfire VIN: 1GCHC23U77
When vehicle first came to the shop found misfires on all cyl. Tune-up was done at this time. After tune-up we found cyl 8 continued to miss but only at Idle. ran compression test and fourn cyl 8 low. Did head job and reinstalled head after returning from head... Trouble codes: P0200 (injection control fault), P0300 (random cyl misfire)
1992 GMC Sonoma 4.3L Poor Idle Quality, Poor Fuel Economy VIN: 1GTDT19W3N
I havent worked on one of these motors for a long long time so it kind of has me scratching my head ! Code 45 Rich Exhaust, Has poor idle and you can smell it is super rich, I checked the M.A.P sensor, Fuel Reg, O/2 Sensor and Fuel Pressure, All Look good. I o... Trouble codes: 45 (Rich Exhaust)
2005 GMC W3500 Forward W3S042 6.0L batt lite blower motor brake and booster lite VIN: 4KDB4B1U05
Im looking for a wiring diagram for this truck, nothing except for the 6.0 is GM. The battery, brake, brake booster lite are on. They think the lites went out going over bumps. there is a relay up on the dash that cliks, when we unplug it the lites go out or a...
1996 Oldsmobile Cutlass Ciera 3.1L Locks, Radio, Interior Lights VIN: 1G3AJ85M2T
Accessory fuse was found blown. The circuit for the rear hatch release is shorted to Power and is constantly activating the hatch release. I have disconnected the harness connection as the driver foot well and eliminated the rear of the vehicle as a cause. The...
1996 Pontiac Grand Am SE 2.4L Stall VIN: 1G2NE12T2T
Hello, I have a 96 pontiac in my shop brought in for a complaint of intermitant engine stall at what is described as a totaly random occurance, hot, cold, idle and cruise. The customer stated that when it happens the security light flashes and will normally r... Trouble codes: B1021

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Limited 3.8L i.p.c. VIN: 1G4HR54K1Y
Yes, it's finally fixed! I had forgotten to mention that we tried a new battery in the car, also. What we found that actually fixed the problem was cleaning the grounds under the carpet beneath the driver's and passenger"s seats. Thanks again for all the help...
2001 Buick Century Custom 3.1L door locks VIN: 1G4HP54K41
replaced the drivers door latch so far so good light is off.
2005 Cadillac CTS 3.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6DP56765
It was the timing chains, thank you to all that replied. Trouble codes: P0018 (Crankshaft- Intake Camshaft Correlation Bank 2), P0012 (Intake Camshaft Position Performance Bank 2), P0300 (p0301-), P0301 (p0302-), P0302 (p0304-), P0304.
2000 Chevrolet Suburban 1500 LT 5.3L Hesitation, Cuts out, Stall VIN: 3GNEC16TXY
Thanks to all of your replies. however the fix still eludes us. vehicle has only been here for one day after posting request. Tried droping exhaust, repaired exhaust leak at manifold, ran vehicle off of alternate fuel supply, boss even found a PCM reasonable. ... Trouble codes: P1571 (tcs pwm circiut no signal. will not set mil.).
2002 Chevrolet Cavalier 2.2L drivers power lock VIN: 3G1JC52412
First, thanks to everyone who read and\or replied to my post. I attempted to try a used BCM but it did absolutely nothing and I was informed by the service manager at the local Chev. dealer that once you program the serial number into it you cannot reprogram i...
2003 Chevrolet Silverado 2500 HD 8.1L No Start VIN: 1GCHK23G63
2004 GMC C5500 Topkick C5C042 8.1L Cuts out VIN: 1GDG5C1E24
I replaced the 8 wires going from the TAC module to the TAC motor, a gm expert told us to try that! and seem to have fixed the problem. Truck has been gone for few days now with no problems. Thanks for everyones ideas on this one. Trouble codes: P2101.
2005 GMC Envoy XL Denali 5.3L Mechanical VIN: 1GKES63M16
it is fixed. one suggested anytime you have a lifter problem replace the vlom. so i pulled it apart and strarted pulling the soleniods off the housing and you could see where the gasket had blowwn out. alowing oil pressure to leak out. you can not buy just the...
2002 Saturn Vue 3.0L cyl. head VIN: 5GZCZ63B02
Seeing I already had head off, opted to replace the head. Will remember to dye test before dissassembly. But with the circumstances, dye testing would have had same result. Valve cover gasket and head gasket were dry.
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