2011 Suburban Box mystery
- Thread starter AKguy
- Start date
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PrairieDrifter
Full Access Member
- Joined
- Dec 28, 2014
- Posts
- 3,853
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- 5,646
- Location
- North Dakota
- First Name
- Mason
- Truck Year
- 84,79,77,76,70,48
- Truck Model
- Suburban k10, bonanza k10, k30, k20, c10, gmc 1/2ton
- Engine Size
- 350, 350, 350, 350, 350, 350
It's the evap box for emissions. Do you have a check engine light? Gm put them in the dumbest spots.
- Joined
- Oct 30, 2019
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- 7,254
- Location
- Downingtown, PA
- First Name
- Wayne
- Truck Year
- 1974
- Truck Model
- Jimmy
- Engine Size
- 350
GM had tech bulletins on some trucks for the evap valve and box. The replacement parts were slightly different.
On your Suburban one of two things, either that is the wrong part, or the bracket it was supposed to be mounted to, rusted away. Need that to pass emissions.
Also if the charcoal box gets raw fuel in it, the charcoal melts and clogs. When fueling, don't top off. When it clogs it is hard to fill the tank as that complete unit is also the tank vent.
On your Suburban one of two things, either that is the wrong part, or the bracket it was supposed to be mounted to, rusted away. Need that to pass emissions.
Also if the charcoal box gets raw fuel in it, the charcoal melts and clogs. When fueling, don't top off. When it clogs it is hard to fill the tank as that complete unit is also the tank vent.
AKguy
Full Access Member
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- Feb 16, 2019
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- 543
- Reaction score
- 892
- Location
- Alaska
- First Name
- Randy
- Truck Year
- 1981
- Truck Model
- K30 Crew Cab Silverado
- Engine Size
- 460
That makes sense. I will look to see where it should have been mounted. I imagine it can’t be too far away, given the length of the lines.
