20 Most Recent 1999 GMC Sierra 3500 - Page 4 Questions & Answers

have throttle body serviced may need to be cleaned

If the Obd says No Link you have a power issue.

Shift solenoid. Hard to tell with one is bad because there is no way to really test them. However your may have 4 solenoids in your transmission.

The starter is where the engine and transmission bolt together, under the exhaust manifold.

The first thing you would need to know is why it won't start on its own.It could be the key switch or a list of other things.Try to narrow down the choices, fuel, ignition, or compression.

sounds like the injectors are clogged

Under hood, center, rear engine area, end of intake manifold, mounted in block. It looks like this:

Read this post. Sounds like the hydro boost or a check valve in the pump is most common.

http://www.dieselplace.com/forum/archive/index.php/t-196203.html