starter motor need overhaul
spray WD40 in the door latch mechanism, it will sometimes get stuck and the lubricant will free it up to engage when the door is closed.
When you park your vehicle.
First you put the vehicle on Neutral then swithc to 4LO it will engage. If a wheel doesn't engage, then you have a vaccum line problem. See owners manual.
To ensure a vehicle is safe to engage in the transporting of hazardous materials.
the four wheel drive is opperated by vacuum that's probably where your problem is
Bang depending on the vehicle, you will ruin the transmission.
There should be a dial next to the temperature controls that say... 2wd/awd/4l/4h
I don't think so... I think the transmission need electric power to engage.
it stands for automatic 4 wheel drive, the What_does_a4wd_mean_on_a_gmc_envoydrive will engage when the vehicle senses tire slippage.Good to use when driving on somewhat snow covered roads where some driving might be on the pavement some on snow. Not good to use the 4wd when on pavement especially when turning.