DEF Heaters on Nationwide Back Order? - Chevy and GMC Duramax Diesel Forum
2011-2016 (Non Powertrain) Discussion of 2011-2016 topics not related to powertrain

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post #1 of 29 (permalink) Old 03-23-2019, 11:00 AM Thread Starter
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DEF Heaters on Nationwide Back Order?

I recently had the common P21DD code come on for the first time at approx 36K miles. My dealer is telling me the DEF heaters are on a nationwide back order. Code was reset and came back about a week later, which I figured it would. I reset it through my CTS2. Hasn't returned (yet)? Anybody heard of this current back order (I know this has happened in the past)...or know of an ETA of the DEF heaters to dealers?

2016 Sierra 2500HD Denali CCSB 4x4
- CCM Leveling Kit
- Bilstein 5100 Shocks
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- Rigid LED Back Up Lights
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post #2 of 29 (permalink) Old 03-23-2019, 12:45 PM
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I got mine replaced 2 weeks ago. It took 3 weeks to get part.
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post #3 of 29 (permalink) Old 03-23-2019, 12:48 PM
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Does this mean the two in my garage are at a all time high?
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post #4 of 29 (permalink) Old 03-23-2019, 07:35 PM
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Quote:
Originally Posted by SilverGorillaLML View Post
Does this mean the two in my garage are at a all time high?
Lol I was thinking the same thing silver!!! Hahaha

2016 Chevy 2500HD: ready lift leveling keys with 1" blocks in rear, Flo Pro 4” NM, EGR blocker plates, Autocal with Mitch Cooper tunes/trans tune, CCV delete, LED 45w headlights and fog lights, white Recon LED cab lights, LED switch back side tow mirror lights, Trex grille inserts, rear husky plastic wheel well liners, custom paint match mirrors, tow hooks and bow ties, Rough Country HD2 side steps, winter tires ultra 20x9" rims with 33"Goodyear dura trac studded, summer tires Mayham Arsenal 20x9" with 35" Comforcer tires
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post #5 of 29 (permalink) Old 03-24-2019, 06:50 PM
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Yup mine sat at the dealer from March 1-18th. My issue was the def level gauge but they replaced the whole unit tank/heater/gauge. I was also told def parts were on nationwide backorder and basically the dealer puts the order in to GM and the parts show up when they show up.

16’ C.C. LT. Since buying it tinted the windows, full floor Weather Techs, factory clone side steps, Boost tow mirrors, and cranked the front end up a little to clear 275/75r17s. That’s all she’s getting for now, got too much warranty left to delete it...yet.
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post #6 of 29 (permalink) Old 03-26-2019, 04:36 PM
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I purchased mine for my LML online under GM part number 22902619 and received it in a couple of days (from a non vendor for less than $200, hence no link posted). Google search that number and you'll see some listings pop up. I would assume it's the same part number for the newer systems, maybe someone else can chime in on that.
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post #7 of 29 (permalink) Old 04-17-2019, 06:56 AM
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Just got the P21DD message today.
Will try to get to the dealer tomorrow, but it seems hit or miss to get the part quickly.

I have one week before I move from VA toTX hauling a very heavy toy hauler.

If I have to let it ride, will it go into limp mode on me, or will the light just stay on?


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post #8 of 29 (permalink) Old 04-17-2019, 09:19 AM
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I have one in my basement-open for bid's !!!
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post #9 of 29 (permalink) Old 04-17-2019, 10:31 AM
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You should be fine I used my truck for 3 weeks every day before I replaced it.
My check engine light turned off by itself after a week or so.
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post #10 of 29 (permalink) Old 04-17-2019, 11:13 AM
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Quote:
Originally Posted by GMCdiesel View Post
You should be fine I used my truck for 3 weeks every day before I replaced it.
My check engine light turned off by itself after a week or so.


So you were not clearing the code and it didn’t limp on you?
I have a 1500 mile trip next week with 16k trailer


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