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**hatzie** · 04-18-2019, 01:23 PM

I looked at several aftermarket under seat storage options for the narrow extra cab rear seat on the 1st and 2nd design GMT800 chassis Silverado/Sierra light trucks. They didn't work for me.

GM made two and since it's been more than a decade since the last GMT800 rolled off the line they are both discontinued;

DISCONTINUED 12498846 - GM Under Rear Seat Storage Bin- 1999-2007 Chevy Silverado/ Gmc Sierra - Extended Cab Only. These were over $300 when they were available. The lid latch locks with keys.
I include this GM stock picture just in case someone sees this in a U-pullit.

More pictures of the BIN storage here. https://www.dieselplace.com/forum/76...html#post78827
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** The above is for information only. I did not find the above BIN**
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What I did find is this...
DISCONTINUED 12498114 - GM Under Rear Seat Storage Divider- 1999-2007 Chevy Silverado/ Gmc Sierra - Extended Cab Only. This includes a lower seat cushion locking bar with keys.
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My installed divider... It's nice to have carpet on the bottom to keep the gear rattles to a minimum and the emergency tire Jack access is not an issue with the divider. Both are in the plus category... The Bin likely would cause issues with the jack and the hard plastic bottom would be noisy. Not to mention the loss of about 1-2" of depth.

I was thinking about building a plywood and speaker carpeted under seat bin til I found one of the discontinued GM 12498114 Under Seat Storage Divider kits still in the bag for $65.

Here's a PDF of the tri-lingual Instructions that come with the kit. English, Français, & Español.129984 Installation Instructions PDF
IMPORTANT NOTE: The instructions contain a fairly obnoxious error in Operation #3 in all three languages. I highlighted the offending word.
The retaining bracket in Figure 4 is NOT on the Passenger side. It is on the driver side.

Attachment plate Driver side. This also where the inside bracket is installed despite what the instruction sheets state in step 3.
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Passenger side attachment plate and lock.
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If you are liberating one of these from a wreck be sure to get the locking bar from the seat support.
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04-18-2019, 01:23 PM	#66
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,913	Re: Hatzies 2005 2500HD I looked at several aftermarket under seat storage options for the narrow extra cab rear seat on the 1st and 2nd design GMT800 chassis Silverado/Sierra light trucks. They didn't work for me. GM made two and since it's been more than a decade since the last GMT800 rolled off the line they are both discontinued; DISCONTINUED 12498846 - GM Under Rear Seat Storage Bin- 1999-2007 Chevy Silverado/ Gmc Sierra - Extended Cab Only. These were over $300 when they were available. The lid latch locks with keys. I include this GM stock picture just in case someone sees this in a U-pullit. More pictures of the BIN storage here. https://www.dieselplace.com/forum/76...html#post78827 . The above is for information only. I did not find the above BIN . What I did find is this... DISCONTINUED 12498114 - GM Under Rear Seat Storage Divider- 1999-2007 Chevy Silverado/ Gmc Sierra - Extended Cab Only. This includes a lower seat cushion locking bar with keys. . My installed divider... It's nice to have carpet on the bottom to keep the gear rattles to a minimum and the emergency tire Jack access is not an issue with the divider. Both are in the plus category... The Bin likely would cause issues with the jack and the hard plastic bottom would be noisy. Not to mention the loss of about 1-2" of depth. I was thinking about building a plywood and speaker carpeted under seat bin til I found one of the discontinued GM 12498114 Under Seat Storage Divider kits still in the bag for $65. Here's a PDF of the tri-lingual Instructions that come with the kit. English, Français, & Español.129984 Installation Instructions PDF IMPORTANT NOTE: The instructions contain a fairly obnoxious error in Operation #3 in all three languages. I highlighted the offending word. The retaining bracket in Figure 4 is NOT on the Passenger side. It is on the driver side. Attachment plate Driver side. This also where the inside bracket is installed despite what the instruction sheets state in step 3. Passenger side attachment plate and lock. If you are liberating one of these from a wreck be sure to get the locking bar from the seat support. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 04-19-2019 at 09:13 AM.