GMC TRANSMISSION NOT SHIFTING

Vin #2gdgg31k6n4506417 / 92 Gmc Vandura 3500 This Van Has Had Intermittent/erratic Speedometer Operation For 3-4 Months Now And Now The...

I Was Driving The Vehicle On The Highway At About 65 Mph, When Suddenly The Transmission Shifted From 4th To 3rd Gear And Would Not Go Back...

Every Few Months, We Drive Our Safari Outside Of The City. And, For The Past 6-9 Months (est), I've Noticed Upshift Failures On Such High...

1999 Gmc Sierra 4 Wheel Drive 5.0 Liter 160,000 Miles. In Overdrive On Highway, Transmission Will Down Shift To 3 Rd Gear, Then Shift...

Transmission Is Continuallly Downshifting Even On Small Grades And Mileage Has Been Cut Because Of This. Have Been Advised Tcm/valve...

All Idiot Lights Are On. Temperature Gauge Is Not Working. The Transmission Will Not Downshift. It Is Stuck In 3rd Gear. Check Engine Light...

1. While Idling The Check Engine Light Came On. I Have Dummy Duel Exhaust That Split Under The Cab And Then Go Into Duels. - Fixed 2...

I Just Replaced The Transmission Filter For Maintence, Now The Trans Will Not Shift Out Of 2nd Gear. I Dropped The Pan And Found The...

Transmission Shift Harsh From Second To Third Around 3,300 Rpm's. Then Will Not Up Shift From Third To Fourth At All, Even At 3,300 Rpm...

Hello, I Put The Vehicle In Reverse, It Sounded Like It Slammed Pretty Hard, And It Would Not Move When Given Gas, But Still Rolled. I...