Next was the installation of the new weather-stripping from Brothers and evaluation of the glass and windshield trim. Aside from the aging windshield, all the glass was in excellent condition. The original-factory stainless windshield trim was in reasonably good condition. However, we soon found out that it could be replaced with brand new stainless from Brothers for the same money it would cost us to have the original-factory trim polished and brought back to life.

We also found segments of the wiring loom that went to the side markers, taillights, gas tank-sending unit, and rear license plate lighting all had suffered various indignities during a life span as a truck. It should be noted that since we have switched to a GM Performance Parts engine and 4L60E transmission, we opted to replace the engine compartment wiring. Here we mixed and matched wiring to come up with what we needed. The wiring loom (side markers, headlights, turn signals, etc...) from the firewall forward came from American Autowire while the engine management wiring loom (alternator, distributor, starter, etc...) came from Brothers. This work is a matter of carefully removing the old wiring corrosion causes these wires sometimes to be difficult to remove) and replacing it.

Once the wiring, the new weather-stripping, and glass were handled it was time to begin to reconstruct the interior. We can tell you this; it isn't difficult but it will take some time and if you are working on a Suburban it will take you a lot of time!

Sound Insulation
The first step was to decide how to attack the subject of proper insulation against unwanted sound and heat. We settled on Accumat by Scosche located in Oxnard, California. Accumat has long been known for its superior noise suppression. However, earlier testing with Accumat by the magazine staff has also shown it to be an adequate insulator against invasion of exterior heat. We found ourselves with the opportunity to overcome the undesirable affects of both noise and heat with one-stop shopping-so to speak.

Noise may be controlled typically in three ways: vibrations may be damped; noises can be blocked via a wall; or they can be absorbed. In our application we opted to use two different versions of the Accumat-AMT045 and AMT250.

There are three basic sources of noise that you will want to control-road, wind, and structural (moving mechanical parts). These three areas will bombard you inside a truck, especially a Suburban, making it more difficult to enjoy your stereo system, and making the drive, especially a long drive, uncomfortable.

Road noise is typically generated by the tread pattern on your trucks' tires. Typically it will enter the passenger compartment through the floor pan, wheel wells, and firewall.

Wind noise results from your truck being pushed through the air, and can be intensified as speed increases. Generally this noise is high pitched and typically works its way into the passenger compartment via the small gaps, cracks, and panels seams usually found in the floor or firewall.

The structural noise is generally the result of the engine, transmission, rearend, and any other mechanical moving components of the truck. Structural noise is the result of body panels vibrating and multiplying and will affect door, quarter panels, roof, wheel wells, floorpan, and any other body panel your truck has. Have you seen the size of a Suburban roof lately?

Accumat 045 is ideal when attempting to ensure the control of vibrations coming from the doors, roof, or side panels. Here we are trying to control vibration from a structural part of the truck through the excellent damping characteristics of AMT045 that's a single-layer product, .045 inches thick, and comes in a 24x27 inch panel or 1-foot squares. It's a peel and stick material and easily cut to fit. We opted to use AMT045 on the inside of the doors, interior rear side panels, and the roof.