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How much does GMC P25 repair and maintenance cost?

The cost depends on your car, the type of service, and where you live. Here are estimates for a selection of GMC P25 services.

Service Estimate Dealer Estimate Your Savings Location
Service type Differential/Gear Oil Replacement for 1978 GMC P25 V8-5.7L Estimate $86 Dealer Estimate $127 Savings 32.43% Location Denver, CO
Service type Oil Change for 1978 GMC P25 V8-5.7L Estimate $85 Dealer Estimate $138 Savings 37.80% Location Denver, CO
Service type Differential/Gear Oil Replacement for 1975 GMC P25 V8-5.7L Estimate $86 Dealer Estimate $127 Savings 32.43% Location Denver, CO
Service type Differential/Gear Oil Replacement for 1976 GMC P25 V8-5.7L Estimate $86 Dealer Estimate $127 Savings 32.43% Location Denver, CO
Service type Serpentine/Drive Belt Replacement for 1978 GMC P25 L6-4.8L Estimate $115 Dealer Estimate $185 Savings 37.88% Location Denver, CO
Service type Oil Change for 1975 GMC P25 L6-4.8L Estimate $85 Dealer Estimate $138 Savings 37.80% Location Denver, CO
Service type Oil Change for 1976 GMC P25 L6-4.8L Estimate $83 Dealer Estimate $131 Savings 36.55% Location Portland, OR
Service type Differential/Gear Oil Replacement for 1977 GMC P25 L6-4.8L Estimate $85 Dealer Estimate $123 Savings 30.84% Location Portland, OR

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Meet some of our expert GMC P25 mechanics

Sam

Sam

36 Reviews; 13 years of experience
Sam was prompt, knowledgeable and professional. Will definitely be recommending.
La Jolla, CA
February 28
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Jeffrey

Jeffrey

31 Reviews; 21 years of experience
Great job, Great personality. I had to reschedule with 3 other people before he came. He knew what he was doing and answered any questions I had about my car. Anytime I have a problem I'm definitely going to him.
Atlanta, GA
August 15
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Clifton

Clifton

40 Reviews; 26 years of experience
I was very pleased with Clifton, his manner and professionalism. He replaced my fuel sensor and everything is working well. He also showed concern for other questions I had regarding my 2001 Buick. My fan motor was making a roaring noise and I was thinking of replacing my fan motor. He found that the cabin air filter and cover were missing and leaves and debris had entered the intake air opening under the hood. After using my shop vac to remove the air obstruction everything worked like new. This is my first experience with Yourmechanic.com and it definitely will not be my last and I am passing my message of upmost satisfaction on to my family and friends.
Lexington, SC
August 3
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Answers to common GMC P25 questions

Q: Only seem to have 4 Low forward and reverse and reverse 4 HI only.
Answered by Marvin
The transfer case may have damaged the shifter rail or the synchronizer on the shifter rail. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your transfer case.
Q: Sputtering and popping with a loss of power. Most recently died and after driving cat converter was cherry red hot.
Answered by Marvin
Hi there. There could be an issue with the spark plugs not firing causing excessive amounts of hydro carbons (raw fuel) to go into the exhaust system. When excessive fuel goes into the exhaust system, the catalytic converter will glow...
Q: Small electrical problems with my lights.
Answered by Mia
Usually a bulb that works intermittently has a shorted filament. In this case, the bulb just needs to be replaced. (https://www.yourmechanic.com/services/brake-light-bulb-replacement) However, if you have already replaced the bulb, my guess is that the socket is corroded or damaged. A...
Q: low brake pedal
Answered by Jay
Hi there. If the brake master (https://www.yourmechanic.com/services/brake-master-cylinder-replacement) is leaking, then it needs to be replaced. You do not need to replace the brake booster (https://www.yourmechanic.com/services/hydraulic-brake-booster-replacement) unless the brake fluid has leaked into the booster. Lastly, the brake light switch (https://www.yourmechanic.com/services/brake-light-switch-replacement)...

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