GM Transmission Problem Sacramento


GM Transmission Problem

What's wrong with my GM Transmission?

There is a known problem with certain GM transmissions. Does your Chevy Silverado, GMC or car shudder, shake or suffer from delays shifting from first gear to second gear, or from second to third?

Many GM models of the Chevrolet Silverado built after 2007 are known to provide drivers with very hard and difficult shifting, slipping gears, and overheating. Many of these trucks have the 6L80 or 6L90 transmissions, but it also effects a number of other GM-built transmissions. There are a variety of symptoms, including very hard and difficult shifting, chugging, slipping gears, and overheating. This is caused by a problem with the Pressure Regulator System (PRS), which uses valves, springs, and ball bearings, and is responsible for maintaining the hydraulic pressures required for the smooth operation of the automatic transmission.

GMC Yukon

GMC Sierra

Chevrolet Camaro

Chevrolet Colorado

Chevrolet Silverado

Cadillac Escalade

Frequently, truck owners complain of:

Hard shifting – owners claim that the vehicle shifts so rough that it almost feels like they have purchased a used vehicle rather than new.

Trouble downshifting – many buyers purchased the Chevy Silverado to use for towing or hauling, which implies a large load.


Sudden jerking – new vehicle owners have complained about this issue, especially when the vehicle is cold first thing in the morning. The jerking has even effected some Silverados with low mileage.

We can fix this problem by using special tools to ream the valve body and replace the broken or worn torque converter.

Chevrolet is aware of some problems with the Silverado transmission malfunction and has notified dealers of a upshift problem. In October of 2022 GM sent out Service Bulletin 22-NA-185, addressing the faulty transmissions including Silverado 1500, and the 2500HD and 3500HD. It also said "The Silverado transmission upshift malfunction can occur in the following conditions":

"During the initial 2nd gear to 3rd gear upshift after the vehicle has been sitting, wiyh the engine off for several hours. This condition may be caused by air that is trapped in the 3-5-R clutch assembly. When the first 2-3 upshift is made this trapped air is purged and the following 2-3 shifts will be normal with no flare.

When transmission ATF temperature is at or below 85 degrees F (30 degrees C). This 2-3 upshift flare can occur until the ATF temperature warms."

If you live in Sacramento and are having these problems with your Chevy or GM truck, bring it into our shop and let us determine exactly what's going on. We can get your transmission fixed, save you thousands of dollars and put you back on the road!

This issue could affect almost any Chevy Silverado or GMC truck transmission, particularly 1500s, 2500HDs and 3500HDs. It has also been reported in passenger cars including Camaros, Caprice and Corvette.