2004 Chevy Aveo brake lights out and shift interlock not disengaging. I replaced the brake light switch at the top of the brake pedal with no change. What is the next most likley direction to look in??
Hello Joe...The Aveo has had it shares of problems, and this is one of them....NHTSA issued several bulletins on the 04 Aveo...this following is the one pertaining to the shift interlock.....
Make : CHEVROLET Model : AVEO Year : 2004
Manufacturer : GENERAL MOTORS CORP.
Service Bulletin Num : 070730007 Date of Bulletin: APR 01, 2007
NHTSA Item Number: 10022265
Component: POWER TRAIN:AUTOMATIC TRANSMISSION
Summary:
AUTOMATIC TRANSAXLE/TRANSMISSION SHIFT LEVER MAY NOT SHIFT OUT OF PARK (REPLACE BRAKE TRANSAXLE SHIFT INTERLOCK (BTSI) SOLENOID). *KB
Take that bulletin number to your dealer and see if they can help.
Untill you can get it repaired heres a little tip for getting it out of park....There is a a little hole in front of their gearshift lever that can correct the problem, temporarily. It should say "brake interlock release" or something like that. With car running, put a key-size object into it and push down while moving the lever. It does not damage the transmission, it just releases the lock. (make sure your foot is on the brake)
Now for the brake light issue...do you have power at the switch you replaced? If so go to the relay and check there...if no power there it's probably a bad ground.
Also...you may or may not know, but the timing belts on these Aveos are prone to failure at aprox 50k ...these failures have caused severe engine damage.
Good luck...i hope the information i've provided you find useful.
Please time to rate me.
The brake light switch controls the interlock solenoid... i checked for more public information bulletins released by GM and came up with this...
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Shifter Stuck in Park
Recommendation/Instructions:
Before replacing any components, verify correct operation of the Stop Lamp Switch. Check for proper adjustment of the switch, poor electrical connection at the switch or incorrect operation of the switch contacts and repair as necessary. It has been identified that the brake switch is more likely the cause compared to the shifter assembly.
Do NOT replace the shifter unless the brake switch has been replaced or adjusted and the condition returns again.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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Since you have already replaced the the brake light switch and the problem still exsists i suspect that the shift interlock solenoid has shorted...Many Aveo owners have had the exact problem...Like i stated previously...contact the dealer and get some feedback. They are aware of this malfunction and should be willing to work with you in getting it corrected.
Hope this helps.
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Thanks,
I have more to add. I checked the brake light fuse 15A and it was cooked. I replaced it and the shift interlock worked when I pressed the brake. I tried it a scond time and the fuse was fried again. Any thoughts??
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