GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: The transmission does not shift into one gear.

1

Remove the transmission. Refer to Transmission Replacement.

Check for worn or damaged gearshift components.

Are the gearshift components OK?

Go to Step 2

Go to Step 3

2

Disassemble the transmission. Refer to Transmission Disassemble.

Look for worn or damaged synchronizer assemblies.

Replace all worn or damaged parts.

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3

Replace the worn or damaged gearshift components. Refer to Clean and Inspect Components.

Will the transmission shift gears?

System OK

Go to Step 2