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  • ECU Performance Programming

  • Performance Chip Programming

  • SUN 450 Diagnostic System

  • Automotive Performance Milling/Lathe/Welding

  • Automotive PCM and electronics repairs

  • ASNU Electronic Injector Flow Bench

  • ECU Reverse Engineering via RaceLogic Emulator

  • New Superflow SF600 Flow Bench--Electronic Valve Spring Analysis

  • Electronic Camshaft Verification Bench

 

 

  

GM COMPUTER

BOX LOCATIONS AND CODES

This is a list of computer locations, and example box 3 or 4 digit codes. These are purely examples as our database of codes is far to big to list them all. If your box code is not listed here it doesn't mean we cannot make a chip, simply email us, give us a call at 403-377-2277 or fax us at 403-377-2270 (24 hours)--have your code ready !

WHAT FOUR LETTER CODE DO WE NEED FOR THE PROM or MEMCAL? Click HERE to view diagram (click on lower right corner icon to enlarge)

Check the bottom of  the page for easy PROM and Memcal removal procedures and installation. Some performance memcals will be piggy backed to an adapter. Pay attention to installation procedures--and always use this page as a guideline.

Vehicle Box Location Example Codes
Buick Century Behind the glove box BDYC
Buick Electra Behind the glove box 4 letters beginning with A or B
Buick Grand National Passenger side kick panel BBKJ
Buick Le Sabre Behind the glove box -- remove under dash panel to access 4 letters beginning with A or B
Buick Park Ave Behind the glove box 4 letters beginning with A or B
Buick Reatta Behind the glove box 4 letters beginning with A or B
Buick Regal Pre 94 Passenger kick panel Post 94 Under hood AXDN, ASHZ, AZKJ, AJSA
Buick Riviera Behind the glove box 4 letters beginning with A or B
Buick Road Master Behind the glove box 4 letters beginning with A or B
Buick Sky Hawk Behind the glove box 4 letters beginning with A or B
Buick Skylark Behind the glove box 4 letters beginning with A or B
Cadillac and Northstar Under the dash towards firewall on passenger side AZYD, BBAW, BCRN, AZCY
Chevy Astro Van Passenger side kick panel 4 letters beginning with A or B
Chevy Beretta Under the dash passenger side AMAN, AJAB, ATDS, ACSY
Chevy Blazer Under the dash passenger side BARL, AMRU, ACTW, ANRW
Chevy Camaro Pre 1994 Under the dash passenger side ACXT, ANTT, BDLD, BDLF
Chevy Camaro 1994-2002 Under the hood passenger side VIN Needed
Chevy Caprice Under the hood drivers side BKNF, BKBW, ATYR
Chevy Cavalier Under the hood passenger side BATX, AXDU, AXDY
Chevy Celebrity Behind the glove box 4 letters beginning with A or B
Chevy CK 1500, 2500, 3500 Behind the glove box 1987-1995 -- remove glove box liner, remove electrical connectors, slide ECM to the left and out ANLW, ASDU, ASDX, BDJL, BJYL, etc...
Chevy Corsica Behind the glove box 4 letters beginning with A or B
Chevy Corvette Passenger side under the dash AXCR, BAFL, BAFN
Chevy Express Behind the glove box 4 letters beginning with A or B
Chevy Impala SS Under the hood behind drivers headlight BLPR, BSDS, BCSY
Chevy Lumina Under the hood passenger side BFRS, BHAK, AUBU
Chevy or Pontiac F body Under passenger side dash 1986-1993 AUJP
Chevy Monte Carlo Passenger side kick panel BKLL
Chevy S10 Behind the glove box--remove glove box liner, remove connectors, slide PCM to the left and out AMRU, BARL, BCTW
Chevy Tahoe Behind the glove box -- remove glove box liner 4 letters beginning with A or B
Chevy TBI Vans Behind panel / rearward of drivers' seat BPSA, ACUN, ARJT
Chevy Yukon Behind the glove box -- remove glove box liner 4 letters beginning with A or B
Chevy Z-34 Under the hood passenger side -- remove glove box liner 4 letters beginning with A or B
GMC Sonoma Under the dash passenger side ATKN, AZUS, BCZP
GMC Suburban Behind the glove box AXHJ, BASB, BANA, BAMP
GMC Syclone Behind the glove box AYBN,  BBZA
GMC Typhoon Behind the glove box AYBN, BBZB
Oldsmobile Passenger side kick panel--some under hood right side BMRY, AZJZ, BHFH, AXDN
Pontiac 6000 Behind the glove box -- Access from under dash. Remove panel 7mm screws 4 letters beginning with A or B
Pontiac Bonneville Behind the glove box -- Usually easier to access from under dash AYZB, ANWB, BHDZ, AZKN
Pontiac Fiero Rearward of center console between the seats AKYN, ALWM
Pontiac Firebird Pre 94 Under right side dash Post 94 Under hood passenger side ABWC, APYU, AUJM, AKXY
Pontiac Le Mans Behind the glove box 4 letters beginning with A or B
Pontiac Grand Am Passenger side kick panel BAKJ, BDBR, BFZW
Pontiac Grand Prix Under the hood passenger side BKXA, ARHL, ATYY
Pontiac Sunbird Behind the glove box 4 letters beginning with A or B
GM Trucks 1996-2000 All are under the hood--Black finned box 4-5 connectors. All have knock module under the cover which must be swapped with replacement PCM Need VIN number
GM Silverado Trucks 1999-2006 All are under the hood, vertical on frame behind black plastic cover, between battery and radiator  -- Aluminum box  clipped to holder with  two harness connectors  and 7mm bolt in each retaining them Need VIN number
Trailblazer 2002-2004 PCM bolted to engine block drivers' side. 10mm nuts on studs, 10mm bolts 3 connectors with 7mm centre bolts retaining the connectors Need VIN number

Chip BCC "codes" are located on the white paper label that's stuck to the computer. You can also find the chip code by removing the lid from the computer (two 1/4" screws) and checking what letter code is on the silver or white label attached to the Memcal or Prom chip. Once we have those letters, we can program your chip. When calling or Emailing an order we need to know the computer code, year, make and model of your car, the engine size and any after market parts you may have added already--remember our performance chips are computer code specific--that's why they're the best !!

If there's no removeable chip, it's newer than 1992 and it's a "flash" only computer, and we'll need your VIN number to send you a complete performance computer.

HOW to REMOVE the PROM (1982 Cars through -1992 Trucks)

Epromrem1.jpg (13000 bytes) Eprom removed from Holder

To get the PROM out of the holder, gently squeeze the sides of the chip holder.  As you squeeze the sides (where the little chip legs reside), the PROM legs should pop loose from the holder and self extracate from the holder. If the chip fails to pop out, gently pry the legs individually  with something sharp (razor blade, electronics screwdriver, etc...) but again--BE CAREFUL. Note the notch in the holder (square) and notch in the chip (rounded). When re-installing the performance chip in the holder, the chip notch must be at the same end as the holder notch !!!!

 

alignprom.jpg (42611 bytes)

 

If you were supplied an ECU with a socket, the chip notch must align with the socket notch.

When re-installing your performance chip, make sure that the notch from the PROM aligns with the notch in the HOLDER (or socket when equipped). IT is impossible to install the holder backwards in the ECU socket--it has indexing notches to prevent this...but installing the PROM backwards in the holder, and turning the key on  will render it unuseable. We do not ship performance chips with holders or sockets--the "holder" is no longer being manufactured, so you must use your old one. Should you require one, we have them in stock.

If your factory chip has a 'holder'--you MUST REUSE the holder !!!

  

For MEMCAL installation,

refer to this procedure:

 

1. Disconnect the vehicle battery negative cable. Remove the kickpanel/glovebox/or other to access the computer. Disconnect the connectors at the computer and remove the computer. Remove the computer memcal cover via two 1/4" screws. Lift off the cover. Underneath you'll see a blue cover with a label or decal identifying the chip calibration. Some do not have a label--the BCC CAL ID (4 digit code) is printed directly on the blue cover in black ink. Under the cover is an ESC (Electronic Spark Control) module to the left in the below picture. The right side has the Eprom--which usually has a decal over the quartz window of the chip. This could be in number format or letter format--we need the letter format. The below picture shows the factory memcal installed in the factory computer. The memcal code and label code should match. If not--let us know what the SERVICE  number  (8 numbers) and 4 digit code are so we can verify your calibration as GM may have installed an updated code. We always like to work from the updates.

 

Dscf0023.jpg (364192 bytes)

 

2. Remove the Blue covered memcal from the computer. If we supplied you an exact duplicate memcal, it installs EXACTLY as you removed the factory memcal. Do not attempt to install it backwards, upside down or inside out. Sometimes we supply a performance chip installed to what we call a "memboard".  This is a piggy-back device that interrupts and supplies our performance program, and yet still uses the  ESC module section of the original memcal.

 

Dscf0015.jpg (346240 bytes)

 

3. Note the row of pins beside the chip on the memboard--these slide into the original MEMCAL that was in your computer. Make sure you slide the pins of the memboard in the beginning slots of the memcal, or you will be mispositioning the memcal/memboard installation. This picture shows the proper installation of the 'memboard' to the 'memcal'.

If you fail to install the two components correctly, you may have a running vehicle with no spark control (fixed base timing--no timing advance).

 

Dscf0019.jpg (355294 bytes)Dscf0017.jpg (357615 bytes)

 

 4. This shows the correctly installed assembly in the computer. Re-install the lid and install the computer back in the vehicle. Reconnect the battery and start. The vehicle may not run correctly for the first initial start-up attempts until it has relearned fuel mapping and knock control. Some transmissions also have relearn adaptives which must have drive time for relearn to occur.

 

Dscf0022.jpg (357737 bytes)

 

Correctly installed in computer.

5.  Reinstall the cover, reconnect the wiring to the vehicle computer,  reinstall the PCM securely to its' holder and reconnect the battery. Turn on the key and note the check engine light. It will flash ONCE and remain on steady. Start the engine. The check engine light will go out. If the check engine light is rapidly flashing or on steady--you've installed the memcal/memboard incorrectly, or have a bad computer socket connection. Recheck the above procedures.

 

If you have further questions or problems--contact us 1-888-WESTER-1.

 

 

Westers' Garage   218 Centre Street   Box 159   Tilley, Alberta -- Canada   T0J 3K0....We'll get YOU going FAST !!

1-403-377-CARS (2277) and 1-403-377-2270 (FAX) or EMAIL US

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   © Wester's Garage 2006