Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1998 GMC EnvoyFACTORY OEM SERVICE PROCEDURE
Lock System Does Not Lock
Lock System Does Not Lock
| Cause | Action |
|---|---|
| The shear bolts are damaged. | Replace the shear bolts. |
| The housing assembly is damaged. | Replace the housing assembly. |
| The shift linkage is not adjusted properly. | Adjust the shift linkage adjustment. |
| The brake transmission shift interlock (BTSI) system is damaged. | Repair or replace the BTSI as needed. |
| The shaft assembly is damaged. | Replace the shaft assembly as needed. |
| The ignition switch assembly is damaged. | Replace the ignition switch assembly. |
| The key is incorrect, bent, or twisted. | Replace the key. |
| The shift lever is not in the P position. | Place the gear shift in the P position |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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