GMC SIERRA DRIVETRAIN

My Truck Will Start Off In First Gear When I First Start Up And Go, But It Will Not Shift Back Down Into Gears After I've Been Driving...

I Don't Know Where My Front Wheel Bearings Are On My Truck. It's Not In Front Where Most Front Wheel Bearings Are. Can You Please...

I Drove My Truck For About 2 Hours At 60-65mph Then Came To A Stop And When I Was Accelerating It Shifted Really Hard Into Second. The...

The Tachometer In My Truck Quit Working A While Back, And Ever Since The Truck Seems To Shift Hard From Park To Drive Or Reverse, As Well...

Is There A Schematic And Labels Of All The Sensors On The Engine And Transmission System Available For My Vortex Engine? Thanks

When I Start Out From A Dead Stop It Feels Like The Trans Is Stuck In 3rd Gear. When I Start With Shifter In 1st Gear It Feels Like Its...

I Just Replaced The Spark Plugs When I Got A Misfire Code On My Truck But Now That I Replaced Them It Struggles To Go Past 3,000 Rpm's...

My Truck Has Auto 4wd With Neutral. 4wd Service Light On, No Codes Showing, I Have Replaced The Switch On The Dash, The Encoder Ring...

Just Happened, Been Parking Here And There All Day, Got Home And It Just Wont Go Into Park. Shifter Feels Like It Just Hits A Wall When...

This Is A Repeat Of "transmission Question" With Some Added Info And A Donation. My Truck Doesn't Have Much Power Anymore. When I Step On...