Its the lifters one of them are collasped its an easy fix if you know engines otherwise it will cost about 400 dollars from a mechanic A lifter makes a tick. If it is knocking loudly, then my money is on a spun rod bearing, also known as rod knock. I would also be willing to bet your oil is way too low, since oil starvation is the quickest way to ruin your engine bearings. The motor will probably be quicker and cheaper to replace with a good used one than to rebuild. If you keep driving the car, it will "sling the rod" through the aluminum engine block, sieze up, and leave you stranded somewhere.
Had the same problem, it was the automatic idler valve. Not an expensive part and easily changed.
Very easily...
A Chevrolet Silverado that has cruise control problems might be having a problem with the part of the engine that controls speed and fuel intake. One culprit for this problem is the Speed Control Sensor that is located in the transmission. This part can be easily changed because it is more or less a probe that fits into the rear of the transmission.
Images of Chevrolet TrailBlazers are easily accessible by visiting Google images and typing in 'Chevrolet TrailBlazers'. Or, you can visit Yahoo images.
No you have to pull on the trigger every time you want it to fire. But you can easily make it fully automatic.
A problem you cant think of.
show me pictures
It may not be equipped with one. If it is you would easily see the cord.
Basically Chevrolet and GMC are identical expect logos and names. So parts that are used for a Chevrolet can easily be interchanged on a GMC truck even a truck topped.
Used vehicles like this can always be found on AutoTrader. This is a popular vehicle and should be easily found at local used car dealers as well as possibly Chevrolet dealers.
The Chevrolet small block is affordable, versatile, plentiful, stock parts and performance parts are easily available. That would be a good choice IMO.
It can help you solve the problem more easily to get the exact answer.