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How-To: Add a Hood Insulator

28K views 63 replies 30 participants last post by  Rick_crew  
#1 ·
Disclaimer
The community here at 355nation.net urges you to please use caution and seek professional assistance when performing modifications to your vehicle. Before attempting any modification it is advised that you refer to your Colorado or Canyon service manual or contact a certified mechanic as not all GMT355 trucks are the same. The staff and the associated members are in no way responsible for any damages, injuries or other harm inflicted to your vehicle or yourself which may result in attempting these modifications. The posts and content presented on this site reflect in no way the views of 355nation.net or it’s ownership.

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A 355nation How To presented by
VTCanyon

Project Name
How-To: Add a Hood Insulator

Project Description
Install a Hood Insulator from 09+ Trucks in a 04-08 Truck

Skill Level
Easy

Project Vehicle
Make: GMC
Model: Canyon
Year: 2006
Engine: 3.5L
Power windows: Yes
Sun Roof: Yes

Parts Needed
(1) Hood Insulator, GM Part # 25863980, approx. $60-65
(7) Retainer Pins, GM Part # 20064875, approx. $1.50 each


Tools Needed
Rubbing Alcohol & Paper Towels (to clean hood)

Project Time
30 minutes or less

Project Cost
Approximately $90

A hood insulator can help reduce engine noise, retain engine heat in the winter, and help keep your hood from becoming very hot in the summer. Trucks built in 2009 and after came with a hood insulator from the factory. The factory hoods, even in the earlier trucks, were designed for a hood insulator.

NOTE: Before ordering the parts for this mod, verify that you have a factory hood with pre-punched holes for the insulator retainer pins.

The longest part of this mod is cleaning the underside of your hood.

Your insulator will arrive in a BIG lightweight box.




Step 1:
Since you will be installing the hood insulator over the inside of your hood, likely permanently, you should clean any dirt, grime, etc. off before getting started.

Before:


After:

Step 2:

Note the factory provided holes in the hood where the retainer pins will be going.



Step 3:
Unpack the insulator from the box and hold up to align with the factory holes. The side with indentations faces the hood. The smooth side with only indentations for the pins should face out. The stamped tabs in the hood will also hold the insulator while you insert the pins.





Step 4:
Insert the plugs, starting with the front and center and work your back towards the rear of the hood.

Step 5:
Step back and admire your new hood insulator.
 
#8 ·
The benefits that I outlined up top are:
- retain engine heat in the winter
- prevent your hood from being very hot in the summer
- noise dampening while driving

You're not likely to see a huge improvement on engine startup, but more likely while driving.
 
#10 ·
Well done, nice cheap mod
 
#12 ·
Czkrebbs,

It does make a HUGE difference in road noise. I have rode in a Colorado that had one and noticed it right away.
 
#19 ·
#20 · (Edited)
Nally sent me an email telling me the part was discontinued and canceled my order last Tuesday.

All the other guys want more $$ for shipping than the part actually costs. Screw that.

ETA Placed the order again and referenced this post showing someone got one last month. We'll see how that goes...
 
#22 ·
When I found out that flares had been discontinued, I decided to try to find a set. After a couple of cancelled orders, I emailed Customer Service at gmpartseast to see if they had any in stock, before I got disappointed again. They didn't have any, but they did do a nationwide search for me and provide links to two Dealers that had them. Maybe they would provide that service for someone looking for an insulator. I'm not sure, but I think any Dealer can do that, if they desire.
 
#25 ·
This is what I got from GM partseast.com :Your order has been voided because of the following reason(s): The ordered part(s) have been discontinued (no longer available) and/or is backordered with no ETA date by the manufacture.
 
#26 ·
I placed the order again with Nally.

This time, they kept the order (didn't just cancel it) but want an additional $100.05 to ship it as it's "oversized". Um, your website told me $30 shipping so that's what I paid you, how about NO?

Dumbest part is that I'm getting a new front bumper and fascia shipped as well as a curt hitch receiver and all those totaled up don't need $130.05 shipping.

WTF nally auto, WTF.
 
#27 ·
I installed one of these a month or two ago and can't say I notice much of a difference. I was expecting more noise reduction. The upside is that it keeps the snow from melting and turning into ice on the hood. If you haven't done it already I would save the money.