1995 Pontiac Grand Prix Replacement gauges

149,000 MILES • 6 CYL • 2WD • AUTOMATIC
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LORRI SCHULZ
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  • 3 POSTS
Are gauge sets that monitor oil pressure, volts and temperature accurate?
Nov 8, 2009 at 10:04 AM
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MMPRINCE4000
  • ✓Experienced Mechanic
  • 8,548 POSTS
For the most part.

Electric gauges use senders and over time the wiring resistance increases and therefore affects the gauge reading.

Most accurate gauges are mechanical ones but in some cases are more difficult to install.

Mechanical coolant temp gauges are a good example, they are one piece (they contain an inert gas) and cannot be dissasembled, so must be installed as a unit.
Nov 9, 2009 at 12:23 AM
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