RPO Code Lookup


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RPO stands for Regular Production Option. RPO codes are usually three digits long, represented in the letters A through Z and the numbers 0 through 9. Each vehicle has a group of codes assigned to it, unique to the options found on that vehicle.

Locating the RPO’s for your vehicle is usually as simple as opening your glove box, or looking in the door jam. Other locations to look for them include the spare tire cover, passenger side pillar, or trunk lid. RPO codes are useful to find out exactly what options or accessories are equipped on your vehicle.

To begin your search, please enter part or all of the RPO code your looking to identify, then press Search. For example, Z71 will get the following results:

Searched For: Z71

Z71      Suspension Package, Off-Road
Z71      Suspension Package, High Stance Off-Road
Z71      Suspension Package, Specially-Tuned
Z71      Chassis Package Off-Road
Z71      Off Road Suspension
Z71      Chassis Package “Off Road”
Z71      Suspension Package, specially tuned
Z71      CHASSIS PACKAGE “OFF ROAD”

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33 Responses to “RPO Code Lookup”

  1. Josh

    05. Aug, 2009

    If you cannot find information for a RPO code using this tool, please leave a comment with the code and the model from which it came from so we can add it to the database. Thanks!

  2. Jeff

    08. Aug, 2009

    601 or 6o1

  3. Jeff

    08. Aug, 2009

    Sorry, 1991 Chevy 2500 4wd, diesel VIN of 1GTGK24JOLE526…

  4. [...] engines folks have. I searched the forum, but didn’t find a list. So, Google came up with this: GM-Trucks.com| RPO Code Lookup Maybe a ’sticky’ topic? (If I have duplicated any efforts here, please ignore.) [...]

  5. DENNIS

    16. Aug, 2009

    2001 chevy 2500 hd 6,0 liter auto the problem is the transfer case is gone . have no numbers to i.d what transfer belongs in it. heres the vin.1GCHK29U61E228202 with manual shift

  6. ROLAND

    22. Aug, 2009

    Great site and was lots of help. There were a few RPO’s I could not find.

    DRC, K5L, NU5, UPF

    Thanks

  7. James

    22. Aug, 2009

    AXN is the rpo code for the hybrid 14 bolt 9.5″ rear diff. on the 2005 up 6.0L enging 2w drive silverados.
    here is a link ot silverado ss site that shows a truck that has the rpo listed in the add.
    http://www.silveradoss.com/forums/index.php?showtopic=46147

  8. Larry Kiger

    23. Aug, 2009

    92 full size chevy blazer- code for keyless entry ? Thank You

  9. Josh

    24. Aug, 2009

    The following codes have been added per your request!

    601 INTERIOR TRIM MED COGNAC (91)
    DRC inside rearview mirror with rear video display
    K5L Heavy-Duty Trailering Package
    NU5 Emission System - California, Bin 4
    UPF Bluetooth for phone, personal cell phone connectivity to vehicle audio system
    AXN IDENTIFY HYBRID AXLE A28

    Good work guys, if you find anything else that’s missing let me know and I WILL find it ;)

    @Larry: Maybe code AU0?

  10. boblabadie

    28. Aug, 2009

    i need to know what the code of the rear entertainment for a 06 tahoe is

  11. LARRY

    29. Aug, 2009

    JOSH, could it be code AU3 ? Thanks Larry

  12. JIM BAKER

    31. Aug, 2009

    The following codes were not listed for my 1985 Chev El Camino.YH6,278, 271, 279.
    All other codes have been found.

  13. Chris Jones

    12. Sep, 2009

    Great Site!! I have (6) RPO codes that I can not find.

    ROO
    R91
    SSB
    331
    333
    4SA

    TIA

  14. Paul

    12. Sep, 2009

    I could not find codes ROO, SAB, UG3, US8, U2K and 1LT for 2009 Silverado 1500

  15. Kathy

    13. Sep, 2009

    Just purchased 2006 Chevy Silverado 1500 and these codes are missing, JP3, JJG, SSB,TSM, 3LT, 691. Thanks so much for the info though very helpful. Kathy

  16. Jim

    18. Sep, 2009

    A great site. The only code I couldn’t find for my 1998 GMC pickup was U382E as listed on the build tag in glove box. Thanks for the help.

  17. Brandon

    24. Sep, 2009

    2003 silverado

    more info on these codes?

    r9u
    r9z
    slm
    vxs
    v73
    1sc
    1sz
    6gl
    7gl

  18. Marc

    24. Sep, 2009

    Could not find the code 521 for a 2001 GMC Yukon.

  19. Sean

    30. Sep, 2009

    What about casting codes?

    I have a 14 bolt FF with casting # 3977323 and CFU 74. Any idea what this means

  20. Walt

    03. Oct, 2009

    2000 Cadillac Escalade -

    code 521 ?

  21. Jonathan

    04. Oct, 2009

    2007 HHR 2LT codes I could not find with the tool:

    (These are above the other codes on the sticker inside the glove box. By the way, the took is great!)
    1AS46 or IAS46
    KHDD3K

  22. Jonathan

    04. Oct, 2009

    Sorry, one more to add. This was below a column of codes in my 2007 HHR 2LT:

    403P

  23. Curtis Peterman

    11. Oct, 2009

    I have a 1988 GMC K-1500 and there is a rpo code of YHN that will not show on this site. I believe it has to do with gear ratio. Thanks

  24. DOOFY-1

    12. Oct, 2009

    Finds the codes that others can’t!

  25. Meghan Hardin

    17. Oct, 2009

    There were a couple extra codes listed on the lable I was wondering if you could tell me what they mean.
    111.5 ; CK10516 ; BC/CC ; U334D

  26. Boomer73

    19. Oct, 2009

    Marc, I think you are looking for 52I (eye), not 521. 521 is not on the master RPO list. 52i is either Light Neutral or Medium Neutral depending on your year/make/model. Bottom line is the color is called Neutral.

  27. Mark

    24. Oct, 2009

    ‘06 Chevy Express G3500. Couldn’t find crp, c99, 1lt, 931.

    RPO sticker is here: http://www.maracing.com/van/IMG_0471.JPG

  28. Mike Workman

    25. Oct, 2009

    This site is fantastc. I have found all but 2 codes.
    code UCB and 7RV are not listed. Any help with the codes would be appreciated

  29. robert murphy

    29. Oct, 2009

    came up nothing on mine
    2004 2500hd 4×4 crew cab,long bed, 8.1L
    #1GCHK23G34F139169

  30. [...] GM-Trucks.com| RPO Code Lookup So I worked a little on the hyperlink above on a few of the codes in my glovebox sticker. For example, G80 (which is on my list in the glovebox) could be (copied verbatim from website): G80 Differential, heavy-duty locking rear G80 Differential, automatic locking rear G80 Differential, heavy-duty automatic locking rear G80 Differential, limited slip rear G80 Differential, limited slip G80 Differential, locking, heavy-duty, rear G80 Differential, Zexel-torsen, limited-slip, rear G80 Differential, automatic G80 Rear Axle: Positraction G80 Locking, Rear Axle G80 Axle Positraction Limited Slip G80 Differential, locking, rear G80 AXLE POSITRACTION LIMITED SLIP As I inferred before, I am a ******* newbie to RPO codes (but I am getting a lot smarter really fast with every post from this forum). The list above does not help much in the HD/non-HD differentiation. Unless, do all of the above descriptions mean the same hardware? Seems impossible - limited slip is in no way the same as locking, for example. Therefore, what information do the RPO codes really impart? Family? [...]

  31. CA-NORTH

    30. Oct, 2009

    RPO = R74 …. on 94 K1500 MOT FOUND.

  32. FRANK SMITH

    31. Oct, 2009

    ‘07 CMC SIERRA 2500 HD “CLASSIC CCSB 4X4 DMAX

    RPO’S N
    ALSO NOT LISTED TO YOUR SITE;

    66W, 921, 922

    EXTREMELY HELPFUL SITE, THANK YOU!!!

  33. Sean

    03. Nov, 2009

    Looking for information to decipher these GM 14 Bolt FF casting numbers:

    Carrier Housing - 3977323

    Pinion Ring - 397735

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