Originally Posted By: john_pifer
Your truck most likely came with a 27F group size battery.
The 35 and the 24F are listed because they will also fit.
The 27F is the largest, followed by the 24F, which is the same width but a little shorter and not quite as long, and then the 35, which is smaller in every dimension.
Here's a little breakdown on the Duralast batteries that are sold at Auto Zone:
27F-DLG Duralast Gold: 710 CCA, 165 reserve min., 50 lbs., $109
24F-DLG Duralast Gold: 750 CCA, 135 reserve min., 44 lbs., $109
35-DLG Duralast Gold: 640 CCA, 100 reserve min., 38 lbs., $116
All Duralast Gold have a 36/96 warranty (36 mos. free replacement, 96 mos. prorated).
All these have plenty of CCA to start your truck. If you have towing pkg, inverter, or aftermarket electronics, you may want to go with the 27F, since it's physically larger and will potentially last longer for that reason.
Personally I have an Ever Start Maxx 24F from Wal-Mart, @ 700 CCA, with 3-year free replacement. That's just what they had in stock at Wal-Mart when I went. Not sure if it has a prorated warranty. It cost me about $80 plus tax in April 2011. I can't remember if my truck had a 24F or a 27F in it as original equipment. Bought my truck new in June 2007, so the OE battery lasted almost 4 years. Pretty typical for OE batteries in my area.
I work at Auto Zone, and I can tell you, any of those three will fit.
They also offer the Duralast Platinum, which is a sealed, spillproof, maintenance-free AGM battery (absorbed glass mat). The main advantage is that it's leakproof under normal circumstances, so you don't have to worry about corrosion. This type of battery is also more resistant to vibration, deep-cycling (although it's not a deep-cycle battery), and periods of unuse than a flooded lead-acid battery, and can deliver more current under certain circumstances.
However, the Platinum doesn't have the pro-rated warranty - just a 36 mo. free replacement and that's it. Consequentially, most folks go with the Gold instead.
The Platinum for your truck would be the Duralast Platinum 34R-AGM: 750 CCA, 120 reserve min, 43 lbs., $146
Every battery I’ve bought in the last twenty years has been from Autozone, except the one in now. I bought that from Orliey’s because it was an emergency. The battery still works, but last week when I opened the hood the terminals and hold down were corroded bad. This weekend I’m heading back to AZ.