Uncommon option K43 and Q20 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**dave6672** · 08-26-2022, 08:02 PM

I came across this C30 9 foot stepside for sale on the side of the road. An uncommon truck anyway, but the had a couple of SPID codes I hadn't seen before.

K43 - Poly-wrap air cleaner (I assume it's not the dyer hose induction system it's currently running)

Q20 - 6.00 x 2.00 Spare Wheel

Any examples of these options out there that are still in place?

**Louisvillekytruck** · 08-26-2022, 08:07 PM

I have never seen that before

**Steeveedee** · 08-26-2022, 09:56 PM

Maybe it had 16" split wheels from the factory? 5" wide sure seems skinny for a 1T wheel, though.

**dagnabbitt** · 08-26-2022, 10:19 PM

Those stepside fender protectors are pretty cool, I would keep them if it was my truck. A white truck with black interior, I assume it was a fleet of some kind.

I have a truck with the K43 code, unfortunately the air cleaner and the rest of the engine are gone, though. What I could find indicated that it was some kind of replacement for the oil bath air cleaner, ie it was meant for dusty roads and conditions.

http://67-72chevytrucks.com/vboard/s...d.php?t=653901

**dave6672** · 08-27-2022, 09:44 PM

I thought the fender protector setup was pretty cool too for a working truck.

**'68OrangeSunshine** · 08-28-2022, 01:40 AM

Quote:

Originally Posted by dave6672

I thought the fender protector setup was pretty cool too for a working truck.

Yeah, I like that. All too often I'll give some bozos a short hop in the back bed, and even when I say ''Don't Step on the Fender'' when exiting, they will anyway. [See below]

The ''Poly Wrap Air Cleaner'' would be some kind of foam band that encircles the paper element for extreme dust environments. K&N sold a similar band for their air cleaners, too.

16 x 5 is not an unusual rim size for that period. My '68 C/10 Stepside specified 17.5 x 5.25 6-lug rims.

WTF is a ''Bulldog Transmission?'' SM465 maybe?

**special-K** · 08-28-2022, 04:24 PM

Yep, the foam band over the paper element and a spare wheel w/o tire.

**dave6672** · 08-28-2022, 09:49 PM

Yes, bulldog is referring to first gear in an SM465 or similar tranny with a very low first gear. A pretty common term in these parts.

**'68OrangeSunshine** · 08-28-2022, 09:54 PM

Quote:

Originally Posted by dave6672

Yes, bulldog is referring to first gear in an SM465 or similar tranny with a very low first gear. A pretty common term in these parts.

In the West, it's a Granny Gear.

**67 twins** · 08-29-2022, 01:59 AM

Quote:

Originally Posted by '68OrangeSunshine

In the West, it's a Granny Gear.

It is in the Midwest as well. We always called it a granny low 4 speed. To me that told you it was a truck transmission as opposed to a car 4 speed.

**special-K** · 08-29-2022, 07:04 AM

Granny or creeper gear here, but I'd get it if someone said bulldog gear. I guess I also hear the grunt gear, or tractor gear, too. It was many years later and they started labeling the shift knobs as L-1-2-3 so people new to the truck world would know to not start out in granny all the time (is my guess). So now you get people calling 1st low and second 1st and there is confusion for some whether it's a 3spd or a 4spd. There are owner manuals. Why not just instruct to use 2nd to start out unless extra pull is needed and leave the shift patter labeling alone?

**Steeveedee** · 08-29-2022, 08:13 AM

I learned that as "compound" low, as a kid. That seems to be more used with two gear boxes in one vehicle, though.

Mike C · 08-29-2022, 10:35 PM

That motor is a late 70’s long water pump small block so who knows what else is changed in that engine compartment.

**oldgold70c10** · 08-30-2022, 04:31 PM

Seems from the vin that this truck started life as a straight 6 and SM465, since there is no RPO's for trans or engine. So it was probably a 250-6 and 4-spd.

**'68OrangeSunshine** · 08-30-2022, 06:09 PM

Quote:

Originally Posted by oldgold70c10

Seems from the vin that this truck started life as a straight 6 and SM465, since there is no RPO's for trans or engine. So it was probably a 250-6 and 4-spd.

A Saginaw 3-OTT would have gotten no mention on the SPID.
SM465 would be listed as M20.

08-26-2022, 08:02 PM	#1
dave6672 Senior Member Join Date: Jul 2008 Location: Carrollton, KY Posts: 1,263	Uncommon option K43 and Q20 I came across this C30 9 foot stepside for sale on the side of the road. An uncommon truck anyway, but the had a couple of SPID codes I hadn't seen before. K43 - Poly-wrap air cleaner (I assume it's not the dyer hose induction system it's currently running) Q20 - 6.00 x 2.00 Spare Wheel Any examples of these options out there that are still in place? Attached Images __________________ Dave R. 1972 K20 1972 C20 Highlander 1967 C10

08-26-2022, 08:07 PM	#2
Louisvillekytruck Senior Member Join Date: Jun 2019 Location: Louisville ky Posts: 1,109	Re: Uncommon option K43 and Q20 I have never seen that before

08-26-2022, 09:56 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,674	Re: Uncommon option K43 and Q20 Maybe it had 16" split wheels from the factory? 5" wide sure seems skinny for a 1T wheel, though. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

08-26-2022, 10:19 PM	#4
dagnabbitt Senior Member Join Date: Dec 2014 Location: Edmonton Alberta Posts: 1,457	Re: Uncommon option K43 and Q20 Those stepside fender protectors are pretty cool, I would keep them if it was my truck. A white truck with black interior, I assume it was a fleet of some kind. I have a truck with the K43 code, unfortunately the air cleaner and the rest of the engine are gone, though. What I could find indicated that it was some kind of replacement for the oil bath air cleaner, ie it was meant for dusty roads and conditions. http://67-72chevytrucks.com/vboard/s...d.php?t=653901 __________________ DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10

08-27-2022, 09:44 PM	#5
dave6672 Senior Member Join Date: Jul 2008 Location: Carrollton, KY Posts: 1,263	Re: Uncommon option K43 and Q20 I thought the fender protector setup was pretty cool too for a working truck. __________________ Dave R. 1972 K20 1972 C20 Highlander 1967 C10

08-28-2022, 04:24 PM	#7
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Uncommon option K43 and Q20 Yep, the foam band over the paper element and a spare wheel w/o tire. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-28-2022, 09:49 PM	#8
dave6672 Senior Member Join Date: Jul 2008 Location: Carrollton, KY Posts: 1,263	Re: Uncommon option K43 and Q20 Yes, bulldog is referring to first gear in an SM465 or similar tranny with a very low first gear. A pretty common term in these parts. __________________ Dave R. 1972 K20 1972 C20 Highlander 1967 C10

08-29-2022, 07:04 AM	#11
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: Uncommon option K43 and Q20 Granny or creeper gear here, but I'd get it if someone said bulldog gear. I guess I also hear the grunt gear, or tractor gear, too. It was many years later and they started labeling the shift knobs as L-1-2-3 so people new to the truck world would know to not start out in granny all the time (is my guess). So now you get people calling 1st low and second 1st and there is confusion for some whether it's a 3spd or a 4spd. There are owner manuals. Why not just instruct to use 2nd to start out unless extra pull is needed and leave the shift patter labeling alone? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

08-29-2022, 08:13 AM	#12
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,674	Re: Uncommon option K43 and Q20 I learned that as "compound" low, as a kid. That seems to be more used with two gear boxes in one vehicle, though. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

08-29-2022, 10:35 PM	#13
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Uncommon option K43 and Q20 That motor is a late 70’s long water pump small block so who knows what else is changed in that engine compartment. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

08-30-2022, 04:31 PM	#14
oldgold70c10 Who's got steelies? Join Date: Feb 2006 Location: Morrison, Oklahoma Posts: 1,025	Re: Uncommon option K43 and Q20 Seems from the vin that this truck started life as a straight 6 and SM465, since there is no RPO's for trans or engine. So it was probably a 250-6 and 4-spd. __________________ 1969 C10 LWB W/ 250 I6 & 3spd 1970 C10 with '67 small window cab, 68 front end, blue; 305/TH350, 3.08 limited slip rear end, manual brakes, power steering; & 4-wheel drums-My daily driver. 1975 Chevelle Malibu Classic Coupe 350/th350 mint green 1970 C20 Suburban 350/700R4 4.10 gearing green & white 1978 Big 10 Silverado 350/th350, working ac, 2 tone blue-My summer daily driver 1983 GMC 1500 Sierra 305/SM465 2.73 rear end How to add a trip odometer to your 67-72 stock speedometer How to rebuild your Q-Jet My Truck Page My Youtube Channel



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