Expert: Skip Bollinger - 4/22/2009

Question
I just replaced the transmission & engine on my 1995 GMC 3500m truck; the truck has always ran at approximately  210degrees.  I also replaced the thermostat that should operate at approximately 195degrees; howver the truck continues to run at 160. The oil pressure is also running between 20 - 40 when it used to run at 60.  Do I need to replace any of the sending units?  If so, where would they be located?

Thanks

Answer
Betty,
  As stated in my profile, I'm a Parts Specialist, NOT a Tech but I will offer you 36 years of Parts Experience for you to consider.
  Firstly, you do not tell me what size engine you are working with. G.M. had both gas and diesel engines offered in that vehicle. You don't tell me if you used your original temperature and oil pressure sending units or if you used the ones from the "donor engine". This could make a WORLD of difference. Lastly, I need to know if you have lights or gauges on the dash.
  This is the best I can offer with the information you have given me. Get back with me at CarPartMan@aol.com and put "Chevy Help" in the subject line. Your mail will go into the Spam Folder but I will see it and respond to the best of my ability.
Skip