| What size engine battery do you use? [message #93597] |
Wed, 28 July 2010 07:37  |
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I currently have a 875 cranking Amp/700 cold cranking amp engine start batter that looks very small for the GMC. This is what came with the GMC so not sure if it is correct.
What happened was that my alternator (80 amp) always seemed to be barely keeping up when running most things. When the air compressor for the suspension would kick on the voltage level shown on the digipanel would drop into the warning level. It would be back in green when it stopped but even the turn signal indicators would make it drop into the warning level. Was never really a problem though always had enough juice to start the engine.
This past weekend we had the A/C on high for the entire trip and the voltage level was in the warning more then the green level. (BTW hanging a clear shower curtain behind the front seats really kept us very cool with just dash A/C best thing we ever did). Stopped for gas and battery was dead and couldn't start it. I thought it might be "hot engine start" issue but the battery cable are all pretty new and connections are good. Had to take the Tracker (toad) and jump the GMC and finally got it started. I didn't turn it off again until at the campground. Had a great time with Grandkids and had my son in-law pick me up an 100 amp alternator. Installed the new alternator and was ready to head home. GMC still needed a jump to get started even though the combiner showed combined and charging. I just figured it never got a full charge and off we went. I didn't turn the engine off for the trip home and the voltage level on the digipanel was up where it should be with everything running so the new alternator is a must have.
Got home and battery was still dead so I am sure I killed the battery and need a new one.
Sorry for the long post but it was a great trip and we had a blast.
Thanks
Bob & Terry Stockholm
Xenia, OH
1976 PB
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