Squarebody steering box ID and interchange

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RetroC10Sport

RetroC10Sport

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With all the steering box questions lately, thought I'd make this thread. Credit goes to jgasca for the pics. :waytogo:

2WD box:
attachment.php


4WD box:
attachment.php


Left: 4WD pitman arm & right: 2WD pitman arm
attachment.php


Around 1980, Saginaw (made most the boxes for GM, Ford and Chrysler) changed the power steering line fittings from standard to metric.

The posts below are the interchanges, the numbers are the Hollander interchange numbers, not all junkyards use these numbers. You can click on the links below to skip to your year, model and type of box needed.

1973-87 C10, C20, C30 manual steering

1973-78 K10, K20, K30 manual steering

1973-76 C10, C20, C30 power steering

1973-76 K10, K20, K30 power steering

1977-79 C10, C20, C30 power steering

1977-79 K10, K20, K30 power steering

1980-91 C10, C20, C30 power steering

1980-91 K10, K20, K30 power steering
 

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Last edited:
RetroC10Sport

RetroC10Sport

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2001
Truck Model
pontiac aztek
Engine Size
3.4
1973-87 C10, C20, C30 manual steering: 551-855


BLAZER/JIMMY (full size) 70-78 Manual Steering; 4x2

BLAZER/JIMMY (full size) 79-82 Manual Steering; (4x2)

CHEVROLET 10 PICKUP 67 Power Steering; (linkage type)

CHEVROLET 10 PICKUP 67-78 Manual Steering; 4x2

CHEVROLET 10 PICKUP 79-87 Manual Steering; (4x2)

CHEVROLET 20 PICKUP 67 Power Steering; (linkage type)

CHEVROLET 20 PICKUP 67-78 Manual Steering; 4x2

CHEVROLET 20 PICKUP 79-87 Manual Steering; (4x2)

CHEVROLET 30 PICKUP 67 Power Steering; (linkage type)

CHEVROLET 30 PICKUP 67-78 Manual Steering; 4x2

CHEVROLET 30 PICKUP 79-87 Manual Steering; (4x2)

GMC 1500 PICKUP 67 Power Steering; (linkage type)

GMC 1500 PICKUP 67-78 Manual Steering; 4x2

GMC 1500 PICKUP 79-87 Manual Steering; (4x2)

GMC 2500 PICKUP 67 Power Steering; (linkage type)

GMC 2500 PICKUP 67-78 Manual Steering; 4x2

GMC 2500 PICKUP 79-87 Manual Steering; (4x2)

GMC 3500 PICKUP 67 Power Steering; (linkage type)

GMC 3500 PICKUP 67-78 Manual Steering; 4x2

GMC 3500 PICKUP 79-87 Manual Steering; (4x2)

SUBURBAN 10 67 Power Steering; (linkage type)

SUBURBAN 10 67-78 Manual Steering; 4x2

SUBURBAN 10 79-87 Manual Steering; (4x2)

SUBURBAN 1500 67 Power Steering; (linkage type)

SUBURBAN 1500 67-78 Manual Steering; 4x2

SUBURBAN 1500 79-87 Manual Steering; (4x2)

SUBURBAN 20 67 Power Steering; (linkage type)

SUBURBAN 20 67-78 Manual Steering; 4x2

SUBURBAN 20 79-87 Manual Steering; (4x2)

SUBURBAN 2500 67 Power Steering; (linkage type)

SUBURBAN 2500 67-78 Manual Steering; 4x2

SUBURBAN 2500 79-87 Manual Steering; (4x2)
 
Last edited:
RetroC10Sport

RetroC10Sport

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Location
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Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1973-78 K10, K20, K30 manual steering: 551-958


BLAZER/JIMMY (full size) 69 Manual Steering; (4x4)

BLAZER/JIMMY (full size) 70-78 Manual Steering; 4x4

CHEVROLET 10 PICKUP 69-78 Manual Steering; 4x4

CHEVROLET 20 PICKUP 69-78 Manual Steering; 4x4

CHEVROLET 30 PICKUP 69-78 Manual Steering; 4x4

GMC 1500 PICKUP 69-78 Manual Steering; 4x4

GMC 2500 PICKUP 69-78 Manual Steering; 4x4

GMC 3500 PICKUP 69-78 Manual Steering; 4x4

SUBURBAN 10 69-78 Manual Steering; 4x4

SUBURBAN 1500 69-78 Manual Steering; 4x4

SUBURBAN 20 69-78 Manual Steering; 4x4

SUBURBAN 2500 69-78 Manual Steering; 4x4
 
Last edited:
RetroC10Sport

RetroC10Sport

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Supporting Member
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Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1973-76 C10, C20, C30 power steering: 551-930


BLAZER/JIMMY (full size) 70-76 Power Steering; 4x2

CHEVROLET 10 PICKUP 68-76 Power Steering; 4x2

CHEVROLET 20 PICKUP 68-76 Power Steering; 4x2

CHEVROLET 30 PICKUP 68-76 Power Steering; 4x2

GMC 1500 PICKUP 68-76 Power Steering; 4x2

GMC 2500 PICKUP 68-76 Power Steering; 4x2

GMC 3500 PICKUP 68-76 Power Steering; 4x2

SUBURBAN 10 68-76 Power Steering; 4x2

SUBURBAN 1500 68-76 Power Steering; 4x2

SUBURBAN 20 68-76 Power Steering; 4x2

SUBURBAN 2500 68-76 Power Steering; 4x2

These fit as well: 551-995

DODGE 100 PICKUP 72-78 Power Steering; 4x2

DODGE 100 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 150 PICKUP 78 Power Steering; 4x2

DODGE 150 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 200 PICKUP 72-78 Power Steering; 4x2

DODGE 200 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 300 PICKUP 72-78 Power Steering; 4x2

DODGE 300 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 400 PICKUP 77-78 Power Steering; 4x2

DODGE 400 PICKUP 79 Power Steering; 4x2, up to 6/12/79

RAMCHARGER 75-78 Power Steering; 4x2

RAMCHARGER 79 Power Steering; 4x2, up to 6/12/79

TRAIL DUSTER 75-78 Power Steering; 4x2

TRAIL DUSTER 79 Power Steering; 4x2, up to 6/12/79

The following fit by including coupler: 551-1248


BLAZER/JIMMY (full size) 77-79 Power Steering; 4x2

CHEVROLET 10 PICKUP 77-79 Power Steering; 4x2

CHEVROLET 20 PICKUP 77-79 Power Steering; 4x2

CHEVROLET 30 PICKUP 77-79 Power Steering; 4x2

GMC 1500 PICKUP 77-79 Power Steering; 4x2

GMC 2500 PICKUP 77-79 Power Steering; 4x2

GMC 3500 PICKUP 77-79 Power Steering; 4x2

SUBURBAN 10 77-79 Power Steering; 4x2

SUBURBAN 1500 77-79 Power Steering; 4x2

SUBURBAN 20 77-79 Power Steering; 4x2

SUBURBAN 2500 77-79 Power Steering; 4x2
 
Last edited:
RetroC10Sport

RetroC10Sport

Supporting Member
Supporting Member
Joined
Sep 29, 2010
Posts
17,172
Reaction score
2,465
Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1973-76 K10, K20, K30 power steering: 551-959


BLAZER/JIMMY (full size) 69 Power Steering; (4x4)

BLAZER/JIMMY (full size) 70-76 Power Steering; 4x4

CHEVROLET 10 PICKUP 69-76 Power Steering; 4x4

CHEVROLET 20 PICKUP 69-76 Power Steering; 4x4

CHEVROLET 30 PICKUP 69-76 Power Steering; 4x4

GMC 1500 PICKUP 69-76 Power Steering; 4x4

GMC 2500 PICKUP 69-76 Power Steering; 4x4

GMC 3500 PICKUP 69-76 Power Steering; 4x4

SUBURBAN 10 69-76 Power Steering; 4x4

SUBURBAN 1500 69-76 Power Steering; 4x4

SUBURBAN 20 69-76 Power Steering; 4x4

SUBURBAN 2500 69-76 Power Steering; 4x4

The following fit by including coupler: 551-1249


BLAZER/JIMMY (full size) 77-79 Power Steering; 4x4

CHEVROLET 10 PICKUP 77-79 Power Steering; 4x4

CHEVROLET 20 PICKUP 77-79 Power Steering; 4x4

CHEVROLET 30 PICKUP 77-79 Power Steering; 4x4

GMC 1500 PICKUP 77-79 Power Steering; 4x4

GMC 2500 PICKUP 77-79 Power Steering; 4x4

GMC 3500 PICKUP 77-79 Power Steering; 4x4

SUBURBAN 10 77-79 Power Steering; 4x4

SUBURBAN 1500 77-79 Power Steering; 4x4

SUBURBAN 20 77-79 Power Steering; 4x4

SUBURBAN 2500 77-79 Power Steering; 4x4
 
Last edited:
RetroC10Sport

RetroC10Sport

Supporting Member
Supporting Member
Joined
Sep 29, 2010
Posts
17,172
Reaction score
2,465
Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1977-79 C10, C20, C30 power steering: 551-1248


BLAZER/JIMMY (full size) 77-79 Power Steering; 4x2

CHEVROLET 10 PICKUP 77-79 Power Steering; 4x2

CHEVROLET 20 PICKUP 77-79 Power Steering; 4x2

CHEVROLET 30 PICKUP 77-79 Power Steering; 4x2

GMC 1500 PICKUP 77-79 Power Steering; 4x2

GMC 2500 PICKUP 77-79 Power Steering; 4x2

GMC 3500 PICKUP 77-79 Power Steering; 4x2

SUBURBAN 10 77-79 Power Steering; 4x2

SUBURBAN 1500 77-79 Power Steering; 4x2

SUBURBAN 20 77-79 Power Steering; 4x2

SUBURBAN 2500 77-79 Power Steering; 4x2

The following fit by including coupler: 551-930

BLAZER/JIMMY (full size) 70-76 Power Steering; 4x2

CHEVROLET 10 PICKUP 68-76 Power Steering; 4x2

CHEVROLET 20 PICKUP 68-76 Power Steering; 4x2

CHEVROLET 30 PICKUP 68-76 Power Steering; 4x2

GMC 1500 PICKUP 68-76 Power Steering; 4x2

GMC 2500 PICKUP 68-76 Power Steering; 4x2

GMC 3500 PICKUP 68-76 Power Steering; 4x2

SUBURBAN 10 68-76 Power Steering; 4x2

SUBURBAN 1500 68-76 Power Steering; 4x2

SUBURBAN 20 68-76 Power Steering; 4x2

SUBURBAN 2500 68-76 Power Steering; 4x2

These fit as well: 551-995

DODGE 100 PICKUP 72-78 Power Steering; 4x2

DODGE 100 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 150 PICKUP 78 Power Steering; 4x2

DODGE 150 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 200 PICKUP 72-78 Power Steering; 4x2

DODGE 200 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 300 PICKUP 72-78 Power Steering; 4x2

DODGE 300 PICKUP 79 Power Steering; 4x2, up to 6/12/79

DODGE 400 PICKUP 77-78 Power Steering; 4x2

DODGE 400 PICKUP 79 Power Steering; 4x2, up to 6/12/79

RAMCHARGER 75-78 Power Steering; 4x2

RAMCHARGER 79 Power Steering; 4x2, up to 6/12/79

TRAIL DUSTER 75-78 Power Steering; 4x2

TRAIL DUSTER 79 Power Steering; 4x2, up to 6/12/79
 
RetroC10Sport

RetroC10Sport

Supporting Member
Supporting Member
Joined
Sep 29, 2010
Posts
17,172
Reaction score
2,465
Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1977-79 K10, K20, K30 power steering: 551-1249

BLAZER/JIMMY (full size) 77-79 Power Steering; 4x4

CHEVROLET 10 PICKUP 77-79 Power Steering; 4x4

CHEVROLET 20 PICKUP 77-79 Power Steering; 4x4

CHEVROLET 30 PICKUP 77-79 Power Steering; 4x4

GMC 1500 PICKUP 77-79 Power Steering; 4x4

GMC 2500 PICKUP 77-79 Power Steering; 4x4

GMC 3500 PICKUP 77-79 Power Steering; 4x4

SUBURBAN 10 77-79 Power Steering; 4x4

SUBURBAN 1500 77-79 Power Steering; 4x4

SUBURBAN 20 77-79 Power Steering; 4x4

SUBURBAN 2500 77-79 Power Steering; 4x4

The following fit by including coupler: 551-959


BLAZER/JIMMY (full size) 69 Power Steering; (4x4)

BLAZER/JIMMY (full size) 70-76 Power Steering; 4x4

CHEVROLET 10 PICKUP 69-76 Power Steering; 4x4

CHEVROLET 20 PICKUP 69-76 Power Steering; 4x4

CHEVROLET 30 PICKUP 69-76 Power Steering; 4x4

GMC 1500 PICKUP 69-76 Power Steering; 4x4

GMC 2500 PICKUP 69-76 Power Steering; 4x4

GMC 3500 PICKUP 69-76 Power Steering; 4x4

SUBURBAN 10 69-76 Power Steering; 4x4

SUBURBAN 1500 69-76 Power Steering; 4x4

SUBURBAN 20 69-76 Power Steering; 4x4

SUBURBAN 2500 69-76 Power Steering; 4x4
 
Last edited:
RetroC10Sport

RetroC10Sport

Supporting Member
Supporting Member
Joined
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Posts
17,172
Reaction score
2,465
Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1980-91 C10, C20, C30 power steering: 551-1262


BLAZER/JIMMY (full size) 80-82 Power Steering; 4x2

CHEVROLET 10 PICKUP 80-87 Power Steering; 4x2

CHEVROLET 20 PICKUP 80-88 Power Steering; 4x2

CHEVROLET 2500 PICKUP 89 Power Steering; VIN models "R/V", 4x2

CHEVROLET 30 PICKUP 80-88 Power Steering; 4x2

CHEVROLET 3500 PICKUP 89-91 Power Steering; VIN models "R/V", 4x2

GMC 1500 PICKUP 80-87 Power Steering; 4x2

GMC 2500 PICKUP 80-87 Power Steering; 4x2

GMC 2500 PICKUP 88-89 Power Steering; VIN models "R/V", 4x2

GMC 3500 PICKUP 80-87 Power Steering; 4x2

GMC 3500 PICKUP 88-91 Power Steering; VIN models "R/V", 4x2

SUBURBAN 10 80-88 Power Steering; 4x2

SUBURBAN 1500 80-91 Power Steering; 4x2

SUBURBAN 20 80-88 Power Steering; 4x2

SUBURBAN 2500 80-91 Power Steering; 4x2
 
RetroC10Sport

RetroC10Sport

Supporting Member
Supporting Member
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Posts
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Location
Green Bastard Parts Unknown
First Name
Jay
Truck Year
2001
Truck Model
pontiac aztek
Engine Size
3.4
1980-91 K10, K20, K30 power steering: 551-1263


BLAZER/JIMMY (full size) 80-82 Power Steering; 4x4

BLAZER/JIMMY (full size) 83-91 Power Steering

CHEVROLET 10 PICKUP 80-87 Power Steering; 4x4

CHEVROLET 20 PICKUP 80-88 Power Steering; 4x4

CHEVROLET 2500 PICKUP 89 Power Steering; VIN models "R/V", 4x4

CHEVROLET 30 PICKUP 80-88 Power Steering; 4x4

CHEVROLET 3500 PICKUP 89-91 Power Steering; VIN models "R/V", 4x4

GMC 1500 PICKUP 80-87 Power Steering; 4x4

GMC 2500 PICKUP 80-87 Power Steering; 4x4

GMC 2500 PICKUP 88-89 Power Steering; VIN models "R/V", 4x4

GMC 3500 PICKUP 80-87 Power Steering; 4x4

GMC 3500 PICKUP 88-91 Power Steering; VIN models "R/V", 4x4

SUBURBAN 10 80-88 Power Steering; 4x4

SUBURBAN 1500 80-91 Power Steering; 4x4

SUBURBAN 20 80-88 Power Steering; 4x4

SUBURBAN 2500 80-91 Power Steering; 4x4

The following fit by including pitman arm, ratios differ: 551-1178

DODGE 100 PICKUP 80-89 Power Steering

DODGE 150 PICKUP 80-93 Power Steering

DODGE 200 PICKUP 80 Power Steering

DODGE 250 PICKUP 81-93 Power Steering

DODGE 300 PICKUP 80 Power Steering

DODGE 350 PICKUP 81-93 Power Steering

DODGE 400 PICKUP 80 Power Steering

DODGE 450 PICKUP 81 Power Steering

RAMCHARGER 80-93 Power Steering

TRAIL DUSTER 80-81 Power Steering
 
J

jgasca

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The photography was amazing!!
 
89Suburban

89Suburban

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Holy Phuck!!!!!!
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8T6K5

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Sweet!!!

I was just going to post asking for confirmation that a box from a 91' K1500 would fit my 86' K5..... and it does.
 
1

1BadAction

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Bringing up an old thread, I've seen nothing mentioned about the Variable Ratio P/S used in the later squares. Any info on this?
 
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