Two problems power sliding door is initiating a fast.
Pontiac montana sliding door problems.
Then work both the lever and gas door back and forth until it the sliding door works right.
The contact owns a 2001 pontiac montana.
Two problems power sliding door is initiating a fast warning chime.
Also have a slower warning chime when in gear.
The 1999 pontiac montana has 10 nhtsa complaints for the structure body door at 3 480 miles average.
Subsequently my van door passanger side came open slamming off half on the road and then remained attached to the top but the track wheel snapped off making it inpossible to put on with out tools and the muscles to even lift it.
The door will have to be relearned.
The cable needs to be lubricated and greased at both ends.
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I fixed it but typically it may have to be replaced if bad.
The problem is usually the gas door end try wd40 with the red stick in the nozzle and spry were the cable connects to the gas door.
2 which sounds mainly your problem is the actuator that opens the latch snapped the plastic arm causing it to work as your saying only when you manually open the door.
The vehicle was taken to an independent.
The door comes unlatched from the pontiac montana mini vans w o power slider also.
Work the gas door back and forth.
The automatic sliding door alarm disable.
Open and close the power sliding doors twice with the overhead or b pillar switch to relearn the position.
1 was the contact block with the problem in the door pins inside the door corrosion ate away where the wires contact the sliding pins.