Question about 1999 GMC Yukon

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I have a gmc yukon and it will not start , could it be the Cadillac convertor

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No its definitly not the cataletic convertor because it just a thing that convertors bad gasses to good gasses so when it comes out the exhaust its not to bad for the air, and dosnt cause as much pullution. you should check the battery if it is old, then needs to be replaced. if its really dirty then clean it the battery post so it has a good connection. or check if any cables are loose. if its not that then it could be your starter it not cranking.

Posted on Jul 08, 2010

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Posted on Jan 02, 2017

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1 Answer

How many o2 sensor are on a 2004 gmc yukon


Hi Charles,

GM products have 4 O2 sensors attached along the exhaust pipes coming off the manifold. Bank 1 is aligned to cylinder 1 on the engine which is the driver's side. Sensor 2 is the one after the convertor (Sensor 1 being the one before the convertor). Link attached for more information.

Oxygen Sensor Locations

I have changed out one of mine; quite easy, but you need a sensor wrench which you can find an any automotive store for around $15.

The part is available readily enough - link attached.

Good luck

Feb 07, 2015 | 2004 GMC Yukon

1 Answer

Gmc Yukon won't go over 20mph help :(


sounds like it's in limp home mode. Any Check engine lights? possibly a clogged catalytic convertor

Dec 23, 2014 | GMC Yukon Cars & Trucks

1 Answer

I have a 2003 yukon Problem with the GMC Yukon XL


What size engine ? 4.3 L vortex P0300 random misfire code is usually associated with vacuum leaks , but could also be low fuel pressure , plugged fuel filter , fuel pump problem , clogged injectors etc... doing fuel pressure an flow testing would confirm or eliminate that as a problem . Fuel injector balance testing would confirm or eliminate clogged injectors .

Mar 24, 2017 | 2003 GMC Yukon XL

1 Answer

Where is the o2 senser, bank 1,senser 2. on a 2003 yukon denali. thanks bill


bank 1 is where number 1 cylinder is, on v6 or v8 engines. it is the sensor on bank 1 behind convertor.

Jul 20, 2010 | 2003 GMC Yukon XL

4 Answers

Replace spedometer cable 2003 gmc yukon xl


There is no speedometer cable on the 2003 Yukon, if there is no transmission issues like shifting problem. Your instrument cluster has gone bad, to pinpoint. Your stepper motor to your speedometer gauge has failed and needs to be replaced. You can do a search on Ebay for the stepper motor for around $10.00 which is better then the $400.00 cost of another instrument cluster.
There was a TSB on the replacement of the instrument cluster for your Yukon free of charge. The only cost to you is the labor charge unless your willing to do the job your self. Just go to the Gm Dealer and give them this TSB Number: # 07187C: Special Coverage Adjustment - Instrument Panel Cluster Gauge Needle Function - (Mar 20, 2009)
Subject:
07187C -- SPECIAL COVERAGE ADJUSTMENT - INSTRUMENT PANEL CLUSTER GAUGE NEEDLE FUNCTION

Models:
2003-2004 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT
2005 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT (U.S. ONLY)
2003-2004 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE
2005 CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE (U.S.ONLY)
2003-2004 GMC SIERRA, YUKON, YUKON XL
2005 GMC SIERRA, YUKON, YUKON XL (U.S. ONLY)

Some customers of all 2003-2004 model year and certain U.S. 2005 model year Cadillac Escalade, Escalade ESV, and Escalade EXT; Chevrolet Avalanche, Silverado, Suburban, and Tahoe; and GMC Sierra, Yukon, and Yukon XL vehicles have reported that one or more of the instrument panel (IP) cluster gauges stick, flutter, or become inoperative. This may cause inaccurate readings, including the speedometer and fuel gauge. Special Coverage Adjustment This special coverage covers the condition described above for a period of 7 years or 70,000 miles (110,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.
Dealers are to replace the instrument panel cluster after the condition has been verified. The repairs will be made at no charge to the customer.

For verified failures between 70,001 miles (110,001 km) and 80,000 miles (130,000 km) on U.S. vehicles, dealers are to provide the customer with an instrument panel cluster (IPC) only. Any additional costs, including labor to replace the instrument panel cluster, will be the responsibility of the customer. Dealers are responsible for the return of the customer's IPC back to the Electronic Service Center

Thank you for using fixya and good luck.

Apr 28, 2010 | 2003 GMC Yukon XL

1 Answer

Scanned truck and found p0420 1999 gmc yukon


The codes only pertain to the convertors (left and right) and no other parts. The only way to get rid of the codes is to replace the convertors. No sensors are bad.

Dec 24, 2009 | 1999 GMC Yukon

3 Answers

2002 GMC Yukon front A/C blowing warm air


Here is a TSB (Technical Service Bulletin) for your vehicle for loss of temp control.
File In Section: 01 - HVAC
Bulletin No.: 01-01-39-007
TECHNICAL
Subject:
Loss Of HVAC System Mode and/or Temperature Control 

(Reroute Wiring Harness)
Models
1999-2002 Chevrolet and GMC C/K Pickup Models (Silverado and Sierra) 1999-2002 Chevrolet and GMC C/K Utility Models (Avalanche, Suburban, Tahoe, Yukon, Yukon XL, Denali) 2001 GMC Sierra C3
2002 GMC Sierra Denali
2002 Cadillac Escalade, Escalade EXT
Some customers may comment that they cannot control the HVAC system modes and/or the temperature. These concerns may be intermittent.
Cause
There may be poor terminal contact and/or bent terminals in connectors C206 (RPO C68 automatic HVAC controls) or C296 (RPO C60 manual HVAC controls). Excessive tension on the wires due to the wiring harness being miss routed in the instrument panel carrier may cause these conditions.

If the warranty campaign is over i am sure they can or may have in the system on how to correct the problem.
Good luck and hope this helps, keep me posted if you need help on to the repair procedure.


May 26, 2009 | 2002 GMC Yukon Denali

1 Answer

(2002 yukon 90,000 miles) low power, service engine lights jus came on all of a sudden,engine won't rev very weak,whats going on, anyone know? jordon


Hello;
There are several things to check. The first is to pull the codes. Then the diagnostics can be far mopre accurate. Could be the fuel pump, filter, clogged cat convertor, or a number of other things.
Thanks;
Rich
RPM Northwest

Jan 26, 2009 | 2005 GMC Yukon

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