Upstream Oxygen Sensor heater performance. That will be the first oxygen sensor in the exhaust pipe ( closest to the engine ) on the passenger side head.
You need to check the wireing connector that hooks to the oxygen sensor for a broken wire are bad connection. If you find no problems, then replace oxygen sensor.
8
check engine light code on my 2001 gmc truck
check engine light code on my 2001 gmc truck
wiring diagram for GMC 2500?
vin plate
Mine is 3.73 semi slip
I just drove from Ohio to Arizona with a 1989 GMC 2500 and averaged 15.5 mpg.
What is the spark plug gap for a 2006 GMC Sierra 2500 , 6.0 L
700r4
That All depends on the motor and rear-end and if it is a 4x4 and ext cab or not . It should tell you in the glove box.
The ECM on the Vandura 2500 is under the Driver's seat.
You did not say what the year of the 2500 was. Need to know.