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Print in friendly format Send this term to a friend  RPO
Regular Production Order. These are the codes that GM uses to identify options.

For example, LT1 is the RPO for the engine used from 1992-1996.
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C4: 1984-1996  > C4 Technical
« 1 2 (3) 4 5 6 ... 105 »
   Topics Replies Views Last Post
Milodon High-Flow Thermostat
 by joeld
6 3203 2017/4/9 16:34
by Matatk
Planning next project Topic has Attachments
 by hcbph
30 19076 2017/4/2 17:56
by Matatk
Clearance of Exotic Muscle Headers Topic has Attachments
 by CorvetteBob
28 11855 2017/3/12 14:55
by CorvetteBob
Please help identify this brace Topic has Attachments
 by Barney
12 4895 2017/2/13 18:33
by bogus
Back on Tuning, found another issue with o2 sensors
 by Danspeed1
10 5604 2017/2/9 6:02
by Danspeed1
Banski MotorSports is having an inventory reduction sale. 20% off all products.
 by astock165
11 6816 2017/2/6 20:01
by bogus
Aftermarket gas pedal mount...
 by CentralCoaster
5 3249 2017/1/31 21:50
by bogus
Replace Rear Axle Seal
 by jimmers
6 3979 2017/1/22 14:08
by PeteK
Carrier bolt rear suspension 87 Topic has Attachments
 by istter1
11 4061 2017/1/19 15:17
by bogus
installing new IAC on 87
 by istter1
11 4097 2017/1/5 2:38
by Matatk
87 c4 under steering wheel above brakes name of panel
 by istter1
4 2407 2016/12/30 18:04
by istter1
1984 blinker relay switch Topic has Attachments
 by Frank
4 2085 2016/12/20 23:45
by Matatk
rear spring
 by bam
3 2548 2016/11/18 19:13
by bam
Wheel Locks - replacing
 by lunytnz
3 3152 2016/11/15 12:53
by Matatk
Hose clamps
 by joeld
9 5354 2016/11/3 19:06
by Schrade
So much for going drag racing tomorrow Topic has Attachments   [1][2]
 by BrianCunningham
70 47332 2016/11/2 23:14
by BrianCunningham
Plastic Resurfacer
 by hcbph
2 2091 2016/11/2 2:19
by Matatk
Replacement rear hatch struts... will they work with my defroster?
 by CentralCoaster
8 6673 2016/10/31 3:58
by Matatk
[1985/A4] Air Conditioning Spewing Fluid Even More Than Usual
 by j3studio
6 3080 2016/10/24 3:15
by Matatk
Started on Battery Cutoff
 by hcbph
10 5127 2016/10/23 11:45
by hcbph
suspension T and F AND Q's
 by oilcan
10 5646 2016/10/20 1:27
by bam
abs C4 1993
 by stitch
3 1866 2016/10/6 15:48
by bogus
Tall valve covers or what?
 by CorvetteBob
19 10675 2016/10/3 21:39
by CorvetteBob
Hard starting after sitting for a while
 by istter1
4 2212 2016/10/2 18:52
by istter1
Brake pads
 by 1989Convertible
5 2830 2016/10/2 3:46
by Matatk
Adjusted timing no timing light
 by istter1
3 1466 2016/9/27 0:03
by istter1
XDF file $8D 1990 Corvette Topic has Attachments
 by Danspeed1
6 4942 2016/9/24 16:24
by Matatk
Fuel Pressure drops quickly
 by joeld
29 25621 2016/9/23 18:06
by tomkatmn
Hard start when hot
 by Flapp
2 2581 2016/9/22 0:27
by Matatk
fixed electrical problems Now on to Problems caused by leaking brake fluid
 by istter1
15 5586 2016/9/17 15:22
by BillH
Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
 by Danspeed1
23 13083 2016/9/16 17:33
by Danspeed1
MAT IAT SENSOR Reading -40 all the time
 by Danspeed1
12 6480 2016/9/7 0:45
by Danspeed1
Drive shaft u-joint change out Topic has Attachments
 by Frank
18 12145 2016/9/5 17:16
by Frank
Smoke under hood poof fuel pump stops working Topic has Attachments   [1][2]
 by istter1
79 43710 2016/8/30 20:23
by Schrade
Uh Oh...
 by CorvetteBob
14 7365 2016/8/28 16:30
by CorvetteBob
87 vet Bilstein rebuild shocks
 by istter1
9 3437 2016/8/27 22:05
by istter1
Centric caliper good or bad Topic has Attachments
 by istter1
7 3610 2016/8/27 19:55
by bogus
Cooling fan relay
 by Frank
3 1764 2016/8/26 14:04
by Frank
Need help with catalytic selection
 by CorvetteBob
14 5584 2016/8/23 2:35
by -=Jeff=-
Instrument Cluster grounds / service... Topic has Attachments
 by Schrade
38 21054 2016/8/21 2:30
by -=Jeff=-
power steering woes
 by Frank
13 7014 2016/8/17 23:25
by Matatk
'94 has several issues...are they related Topic has Attachments
 by KTM200
19 10242 2016/8/13 0:42
by GOLDCYLON
Generic Tech Tip - MAF
 by bogus
1 1445 2016/8/5 22:38
by donhall
92 C4 that does not rev and fault codes
 by tomas_swe
3 2265 2016/8/1 23:48
by donhall
Yo, LT1/4 owners... Maintenance Alert!
 by bogus
16 8244 2016/7/31 19:26
by bogus
Power Seat Tranny Service; Track Swap... Topic has Attachments
 by Schrade
12 4708 2016/7/26 15:58
by Schrade
Trim resto / paint... Topic has Attachments
 by Schrade
15 6310 2016/7/23 1:57
by j3studio
Low voltage indication... Topic has Attachments
 by Schrade
27 14107 2016/7/22 20:37
by Schrade
In-depth Opti article...
 by Schrade
4 2405 2016/7/22 13:56
by Schrade
Lean burn Rt Bank INJ's; DTC 64........... Topic has Attachments
 by Schrade
12 5784 2016/7/11 15:15
by Schrade
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