4WD activation or not.

CHEVROLET TAHOE
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RICHR
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  • 4 POSTS
Have a 2000 tahoe z71 with 80K+ on it.. Twice this has happened.. I go to activate the 4WD (pushbutton) and nothing happens - no 4WD and no dash lights come on indicating that the 4WD is activated and the 'service 4WD lite comes on.' Sometime later I try it again and it all works fine. Vehicle does remain in 2WD when this happens. :(
Jan 16, 2006 at 4:40 AM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Have the four-wheel-drive control system checked during the fault before replacing the switch or actuator. Provide the intermittent warning and lack of indicator response; do not rely on four-wheel drive until operation is verified.

Guidance references and applicability

Source: Original question and visible replies. Owner reports and other participants' experiences are distinguished. Next steps are editorial guidance for obtaining diagnosis or clarifying the reported findings; they are not a verified repair procedure or an independently confirmed component diagnosis.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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R. RYBAK
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  • 2 POSTS
i had the same problem it turned out to be the wiring on the actuator. which is under the vehicle close to the front of the trans.
Jan 18, 2006 at 11:35 AM
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GSINALTUS
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  • 3 POSTS
I had this problem with my 2000 Z71. Turned out to be the actual 4wd switch and the mechanic said it was fairly common problem.
Jan 20, 2006 at 1:23 AM

Discussion summary

4WD activation or not.

A 2000 Chevrolet Tahoe Z71 intermittently failed to engage push-button four-wheel drive, with no engagement indication and a service-4WD warning. The owner reported that it remained in two-wheel drive and sometimes worked normally later.

Reported outcome: The original owner did not report a confirmed diagnosis or completed repair.

Other participants described actuator wiring and a dashboard switch as causes on their own vehicles. Neither was confirmed for the original Tahoe.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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