C1500 Dual Battery Really Necessary?

[Mattj96]

My recently acquired 98 C1500 5.7 has a very slow crank on startup and it's getting worse, so I am going probably need to replace the battery, but my truck has two batteries. I don't want to pay for 2 batteries, is it easy to revert back to a single battery? There isn't any winch or subwoofers or anything that would necessitate dual batteries.

 

[Tavi]

Chance might have it, one of those batteries (driver’s side) isn’t actually wired into main electrical. Probably an isolator on inner fender well. So you might actually by able to swap the batteries from side to side and solve your problem.

 

[RichLo]

Yea, no reason you need two if there's no extra draw from anywhere. Big question is why is there two in there to begin with?

 

[Tavi]

Dual (auxiliary battery) was available from the factory. RPO TR2. For accessories, winch, plow, trailer.

 

[Mattj96]

Had them tested and both were bad, so i put two new batteries in. Now its starting and running just fine, but right after I put the batteries in the front drivers side signal is constantly on and that headlight doesn't work.