List of maintenance part numbers (TBI, 91-93 cars www.archive.org cache)

Note: Many of these links have "web.archive.org" in them from the website I found the page on. It was the latest I could find.

Sources for info:

1. GM Parts & Illustration books for Chevrolet Caprice/Impala 1991-1996

2. http://web.archive.org/web/20061116113851/http://www.gmpartsdirect.com/

3. http://web.archive.org/web/20061116113851/http://www.acdelco.com/

4. http://web.archive.org/web/20061116113851/http://www.rockauto.com/

5. http://web.archive.org/web/20061116113851/http://www.tomco-inc.com/

6. http://web.archive.org/web/20061116113851/http://www.smpcorp.com/
or
http://web.archive.org/web/20061116113851/http://www.smpcorp.com/web_app/catalog/publiccatalog.asp

Part numbers are GM unless otherwise indicated.

Some parts used on 91-93 model year (whale) cars, as well as for 1977-1990 brick models, especially for chassis/suspension and in some cases body parts, are common with the 94-96 cars. So check the (94-96) Maintenance Parts sticky thread in addition to this one.

Contributors to this list are: kdrolt, SSnow, LazyDestroyer (a.k.a. Blake), Alex Melero, Chris McCabe, Marcin Kaluski, Bob Lane, and Eric Michael, darth (Carl), Caprice Freak, LarryCigar
. Last edited Oct 2006.
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Service Parts Identification Decal, a.k.a. the "SPID" that lists the RPO and SEO three-digits codes as installed at the factory. This is probably more accurately known as the SPIL, for Service Parts Identification Label.

See:
http://web.archive.org/web/20061116113851/http://www.9c1.com/technical/rpo_codes.htm
http://web.archive.org/web/20061116113851/http://groomlakelabs.com/testing/rpo_lookup.php


Tech Info & Articles on 9C1 Police Package
http://web.archive.org/web/20061116113851/http://www.9c1.com/technical/


Police Package Brochures (9C1, 1A2, B4C)
http://web.archive.org/web/20061116113851/http://www.9c1.com/brochures/index.html

What engine do I have?
There were three different engines offered in the 91-93 fullsize GM TBI cars. Look at the 8th position in VIN:
if "Z", engine is 262 cid (4.3 liter) v6 and the car is a 9C6 taxi
if "E", engine is 305 cid (5.0 liter) v8
if "7", engine is 350 cid (5.7 liter) v8

For the Chevys, the "7" code engines were only available in 91-92 in the 9C1 police package model, and in 1993 either in the 9C1 or the LTZ Caprice. Chevy wagons all got the 305 v8.

For Buick sedans and wagons, and Olds wagon, the std engine was the 305 but the 350 was optional. IIRC the Cadillac also had the 305 and 350 TBI engines during the early 1990s.... but I don't recall the yearwise breakdown for when the carburated 307 v8 was replaced by the 305 and 350 TBI engines.


Is my car an LTZ ?
http://web.archive.org/web/20061116...bin/ultimatebb.cgi?ubb=get_topic;f=9;t=002023

Specs for the TBI v8s: LO3 305 and the LO5 350
truck engines:
http://web.archive.org/web/20061116...echboard/tbi/361153-lo5-info.html#post2872120
car engines:
http://web.archive.org/web/20061116...techboard/tbi/128005-lo5-goodwrench-l98.html?


Radiator & Cooling system
RC27 15lbs AC Delco radiator cap, 10409635


Engine & Fuel
TBI Intake gasket: 25511809

TBI DIY adjustable fuel pressure regulator (FPR) modification:
http://web.archive.org/web/20061116113851/http://www.b-body.org/forum/forum_posts.asp?TID=324&PN=1
http://web.archive.org/web/20061116113851/http://www.thirdgen.org/tbi-afpr

TBI fuel injectors
http://web.archive.org/web/20061116...bin/ultimatebb.cgi?ubb=get_topic&f=1&t=008825

Fuel Filter, L05, 1993, SEO 1A2, 25121801 ($10.05 on 02-17-00) probably for all 91-93 TBI cars)

PCV Valve, L05, 1993, SEO 1A2 25098542 ($5.75 on 02-17-00) probably works on all 91-93 models)

1.6 ratio self-aligning stamped-steel rocker arms
Sealed Power (Federal Mogul) R-1023R
or
Elgin RK-738
http://web.archive.org/web/20061116...in/ultimatebb.cgi?ubb=get_topic;f=34;t=001825
http://web.archive.org/web/20061116...bin/ultimatebb.cgi?ubb=get_topic;f=1;t=005420
Several places sell them including Advance Auto Parts, Scoggin Dickey. Summit has them too but they're gouging the price up compared to buying them elsewhere.

Hypertech chip Should I buy one? What do they do?
http://web.archive.org/web/20061116...imatebb.php?ubb=get_topic;f=1;t=011257#000000

ECM EPROM (chip) reprogramming
16136965 ECM (1991-1993 only with $62 definition file; note: earlier 89-90 TBI Bcars used the 8746 ECM with, IIRC the $61 definition file); all use the 2732 4K*8 EPROM
http://web.archive.org/web/20061116...in/ultimatebb.cgi?ubb=get_topic;f=34;t=001825
http://web.archive.org/web/20061116113851/http://www.cruzers.com/~ludis/
http://web.archive.org/web/20061116113851/http://www.diy-efi.org/
http://web.archive.org/web/20061116113851/http://www.tunercat.com/
http://web.archive.org/web/20061116113851/http://www.moates.net/phpforum/index.php
http://web.archive.org/web/20061116113851/http://www.efitune.com/forum/index.php?act=SF&f=12
http://web.archive.org/web/20061116...in/ultimatebb.cgi?ubb=get_topic;f=34;t=000851

http://web.archive.org/web/20061116...matebb.php?ubb=get_topic;f=34;t=002257#000001

WINALDL datalogging:
http://web.archive.org/web/20061116...matebb.php?ubb=get_topic;f=34;t=001449#000001
http://web.archive.org/web/20061116...bin/ultimatebb.cgi?ubb=get_topic;f=9;t=001574
http://web.archive.org/web/20061116113851/http://www.aldlcable.com/

Knock module for LO5 (for 305 to 350 engine swaps). ESC = electronic spark control
350 knock sensor (GM part #10456288): $25.22 (GMpartsdirect.com)

350 (5.7) ESC Module (GM part #16128261): $46.37 (GMpartsdirect.com)

AC delete pulley: 10055890
http://web.archive.org/web/20061116...org/techbb2/showthread.php?s=&threadid=251909

Intake manifolds
91-93 TBI engines on whale Bcars used a specific aluminum dual-plane intake manifold that was slightly different than used on TBI Fcars and C/K/G body TBI trucks. The cowl overhang on the Bcars required the use of a specific/compatible distributor to allow clearance for removal and replacement. The distributors had a fatter flange (larger outside diameter) than the Fcars and trucks had, and the corresponding intake had a distributor hole that was sized to match. In addition, the length of the distributor shaft was (according to my sources) shorter on the 91-93 Bcars than on the TBI Fcars, trucks. That means aftermarket TBI intakes won't work on the 91-93 Bcars without modification.

Note that I never mentioned the 89-90 TBI Bcars (brick style). They do not have the same cowl overhang "problem" as the 91-93 models did so they are, AFAIK, the same as used on Fcars & trucks so the aftermarket manfolds will work on them.

Related threads:
http://web.archive.org/web/20061116....php?s=&threadid=125878&highlight=distributor

http://web.archive.org/web/20061116...bin/ultimatebb.cgi?ubb=get_topic;f=1;t=007796

So in most cases it is easier to port the factory 91-93 Bcar intake manifold rather than in buying an aftermarket unit. The porting steps are similar to those shown by Vizard in his sbc Carbs & Intake book. The plenum divider, a metal wall with a small window, between the bores on the factory intake may also be removed if the (hidden) water jacket holes are welded closed if exposed. And FYI, the water (coolant) jacket in the intake serves to stabilize the temperature of the air intake in the presence of EGR (heating), fuel evaporation (cooling), and underside oil splash (heating).

In addition, GM has supposedly produced performance intakes for TBI cars in the past, though they are assuredly discontinued by now. I don't know if they really differ much from the production intakes. What follows is a quote from Sallee's web site:

http://web.archive.org/web/20061116...let.com/frame.html?/Intake_Manifolds/sbc.html

GM 14088675 SBC Aluminum, 2BBL Performance Intake Manifold. This intake manifold was used in production from 1984 through 1990 with TBI but makes a good performance two-barrel manifold where required. (Discontinued)

Another GM sbc TBI intake rumored to be for performance is 14088674.


Porting the stock heads
350
http://web.archive.org/web/20061116...hp?s=&threadid=283217&highlight=garage+ported
305
http://web.archive.org/web/20061116113851/http://www.ws6transam.org/ported.html

Distributor parts
coil, distributor pick up (AC Delco D1987) 10495089
retainer, distrib ign pick up coil 10488259
shield, distrib ign pick up coil 10496783
pole piece, distrib pickup (AC Delco D1987A) 10474000

cap, distrib (AC Delco D303A) 10477841
cap, distrib (Standard Motor, Blue Streak DR468X)
rotor, distrib (AC Delco D447) 10496798
rotor, distrib (Standard Motor, DR326X)

Spark Plugs, L05, 1993, SEO 1A2 5614258 (qty=8, $1.57 each, $12.56 total on 02-17-00) (probably works on all 91-93 305 and 350 v8)

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