Frequently Asked Questions About GMC Brigadier Truck Air Tanks, Wraps & Mounting

What size air tanks are compatible with my GMC Brigadier, and how do I determine the correct capacity?

GMC Brigadier trucks typically accommodate air tanks ranging from 11 to 25 gallons, depending on your model year and configuration. For 1977-1988 Brigadiers with single axle setups, 11-15 gallon tanks are standard, while tandem axle models often require 20-25 gallon tanks. Check your door jamb sticker for the original tank specifications, or measure your existing tank's diameter and length. Most Brigadier models use either 11" or 12.25" diameter tanks with lengths varying from 24" to 36".

Will aftermarket air tank mounting brackets fit my Brigadier's frame rails without modification?

Most universal mounting brackets require some adjustment for Brigadier frame rails, which measure 10.125" to 10.25" wide on standard models. Look for brackets specifically designed for GMC medium-duty trucks or adjustable universal brackets with a range of 9.5" to 11". Pre-1980 Brigadiers may have different frame spacing, so always measure your rail width and spacing before ordering. Steel strap-style mounts typically offer more flexibility than rigid bracket systems.

How difficult is it to install air tank heat wraps, and do they really prevent freeze-ups in cold climates?

Installing heat wraps takes about 30-45 minutes per tank and requires basic hand tools. The wraps attach with integrated straps or separate mounting bands. For effectiveness, 12-volt electric heat wraps maintain tank temperatures above 32?F down to ambient temperatures of -20?F when the truck is running. Many Brigadier owners in northern states report significant reduction in freeze-related air system failures. Ensure your electrical system can handle the additional 5-8 amp draw per wrap.

Are aluminum or steel air tanks better for GMC Brigadier trucks used in salt belt states?

Aluminum tanks are strongly recommended for salt belt operations due to superior corrosion resistance, lasting 10-15 years versus 5-7 years for steel tanks in harsh conditions. While aluminum tanks cost 40-60% more initially, they're lighter (reducing weight by 15-20 pounds per tank) and eliminate rust contamination in your air system. Steel tanks with quality powder coating can perform adequately with regular maintenance, but require annual inspection and touch-up painting.

What's the proper mounting height and angle for air tanks on a Brigadier to ensure proper drainage?

Mount air tanks with a 1/4" to 1/2" per foot slope toward the drain valve, with the drain valve at the lowest point. For Brigadiers, optimal mounting height places the tank bottom 18-24 inches from ground level to prevent road debris damage while maintaining accessibility. The supply port should be at the high end to prevent moisture from entering air lines. Ensure at least 2 inches of clearance between the tank and any moving components like driveshafts or suspension parts.