So I am now the proud owner of a 2007 Chevy Silverado 1500 LT Extended Cab with 151,000 miles on it. Yesterday I needed to do my first oil change on it, and step one is to lift the front end onto jack stands. Pertinent details:
- The vehicle curb weight is 5745 pounds.
- The stands are very tall and are each rated for 3 tons.
- The floor jack is also rated for 3 tons.
- I looked up the jacking points in the manual and used them. They are on the frame rails just aft of the front wheels.
- The tops of the jack stands do have rubber covers to reduce the effect of the stand on the frame, but there is nothing else between the stand head and the frame.
Here's my question: When I lifted the front end by placing the jack on a frame rail cross member, as I slowly lowered the weight onto the stands the insert that can be raised and lowered (see arrows in attached picture) tilted about 5 degrees as it took the weight. It was already centered correctly under the frame member and moving it to one side would make a slip off more likely. Was this a safe situation? I did the oil change by using both stands and leaving the floor jack in place without weight on it as a safety backup. Was this safe? How do you verify that the lift you've done is actually safe? Or is it just time to buy myself a 4 post lift and be done with it?
What makes me nervous is the very heavy curb weight of the vehicle, and the possibility of that weight pushing the stand top through the frame rail, slipping off the stand, or extending the stand height beyond what it should be and having it fold in half. All with a very unhappy me under all that weight.