Does the volt meter read too high?


Asked by Sep 20, 2014 at 10:04 PM about the 2010 GMC Sierra 1500 SLT Crew Cab 4WD

Question type: Maintenance & Repair

Had a short in the rear view mirror.  Now replaced.  Now noticing the volt meter rides
above 14 (best guess is about 15v, looking at the gauge.   Only comes down slightly
when running at highway speeds for 30 minutes.   Have had truck for the past 3 years
and just is not the same indications it has always had. Any ideas on what may be causing

4 Answers


Best thing is to have the alternator checked out. AutoZone and places like that for free. It might just be a coincidence.


Thanks mark. But just got back from Gmc dealer (they had to replace the mirror)and they said the diagnostics alternators etc is working within specs. Just that ever since I have had this truck and I bought it new, it always has settled in at 14v, no it does not. Just wondering if the short caused more issues not yet discovered?


It could just be the gage. If GM gave you a green light then you should be fine. Just keep an eye on things.


Thanks Mark

Your Answer

Add photo

Related Questions

  • High Oil pressure reading, what will cause it? 2 answers

    High oil pressure reading on gauge. Is this something that will harm my engine? and what is casuing this. oil level ok, and no leaks.

    2003 GMC Sierra 1500 STD Extended Cab SB


    Maintenance & Repair

  • Truck won't start 26 answers

    Recently I have experienced starting issues. One minute it starts and runs great, next time I try to start it it turns over but won't start. Let sit for awhile, turn key, won't start, turn key off...

    1988 GMC Sierra 1500 C1500 Standard Cab SB


    Maintenance & Repair

  • headlights 3 answers

    passenger headlight will not work ,bulb is good so are the fuses & relay replaced switch but did not fix problem any suggestions on where to go from here

    2006 GMC Sierra 1500 SLT Crew Cab 4WD 5.8 ft. SB


    Maintenance & Repair

  • After installing new distributor,why is oil pressure high,and water temp low? 1 answer

    Ive set timing,by tdc,twice now,and it still reads 60 psi oil pressure,& about 100° water temp

    1996 GMC Sierra 1500 C1500 SL Extended Cab LB


    Maintenance & Repair

  • oil gauge is reading high all the time in my 2005 yukon xl 2 answers

    my oil pressure gauge is reading high and check engine light is on



    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 56,412 nationwide Sierra 1500 listings starting at $2,400.


Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
Reputation 4,390
#2 John Saffrahn
John Saffrahn
Reputation 3,070
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,690
View All

Related Models For Sale

Used Chevrolet Silverado 1500"
2,453 Great Deals out of 144,268 listings starting at $1,995
Used Ford F-150"
3,239 Great Deals out of 216,692 listings starting at $1,000
Used GMC Sierra 2500HD"
164 Great Deals out of 15,345 listings starting at $1,900
Used Dodge Ram 1500"
537 Great Deals out of 13,916 listings starting at $1,595
Used Toyota Tundra"
632 Great Deals out of 26,605 listings starting at $2,500
Used Toyota Tacoma"
624 Great Deals out of 30,427 listings starting at $2,850
Used Ram 1500"
1,321 Great Deals out of 111,557 listings starting at $7,999
Used Chevrolet Silverado 2500HD"
390 Great Deals out of 33,950 listings starting at $2,998
Used Chevrolet Tahoe"
1,126 Great Deals out of 36,602 listings starting at $1,695
Used Ford F-250 Super Duty"
462 Great Deals out of 42,855 listings starting at $1,000
Used GMC Yukon"
568 Great Deals out of 14,716 listings starting at $1,500
Used GMC Yukon Denali"
33 Great Deals out of 4,641 listings starting at $7,995
Used Chevrolet Camaro"
839 Great Deals out of 39,073 listings starting at $2,650

Used Cars For Sale

2017 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
8,018 listings starting at $38,840
2016 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
14 Great Deals out of 988 listings starting at $39,601
2015 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
45 Great Deals out of 1,034 listings starting at $30,000
2014 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
51 Great Deals out of 1,347 listings starting at $24,891
2013 GMC Sierra 1500 SLT Crew Cab 4WD For Sale
12 Great Deals out of 280 listings starting at $23,052