GMC Sierra Lights Warning

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7 discussions

Code P20b9 And “service Exhaust System” Warning On

2015 GMC SIERRA

Will Installing A New Def Heater Resolve This Issue Or Is There Other Steps I Should Look Into First?

1 ANSWER

Asked by charlie1229

2009 GMC SIERRA

Warning Light Comes On To Service Also Reduce Engine Power, I Travelled Approx. 20-30km Do You Think I Have Done More Damage, Is It...

1 ANSWER

Asked by poppies

2008 GMC SIERRA

Computor Says The Engine Is Overheated Turn The A/c Off, But The Temp Guage Is Stuck On 160 Degrees. Are There A Sensor Bad, The Motor Is...

1 ANSWER

Asked by gpreece

2007 GMC SIERRA

Will Not Go Into Any Gear Including Reverse. Is My Tranny Completely Shot? There Were No Sounds At All, Just Stopped Going And The Engine...

1 ANSWER

Asked by JBlanche

2003 GMC SIERRA

Reduced Engine Power Warning Light. No Acceleration Not Overheating, Good Oil Pressure

1 ANSWER

Asked by marshcin

1999 GMC SIERRA

We Put The Truck In Reverse And All The Warning Lights On The Dash Came On. The Truck Stayed Running However The Idle Would Slow Down And...

1 ANSWER

Asked by todd4123

1994 GMC SIERRA

1994 Gmc 1500 2wd Dies Without Warning. Pull Off To The Side Of The Road And Wait Five Minutes. Starts Back Up And I Am On My Merry Way....

2 ANSWERS

Asked by Bill111

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