Having problems with your 2006 Chevrolet Silverado 1500 2WD ?

Got numerous "tighten gas cap" messages. finally

Posted / edited by AnonymousUser on : 18-06-2018

Answers :

Computer is seeing a large evap leak. most common cause is gas cap left loose this is why it is throwing up that message. since you have already done that we know there is a leak somewhere else. look underr vehicle and should see a black rectangular box close to gas tank this is the evap canister check the lines hooked to this and just do a visual inspection of hoses see if one has come off. may need to have it checked out we have a machine that hooks into system and pressurizes with "smoke" the smoke leaks out of the problem area and helps diagnose .
Repair Help & Product Troubleshooting for 2006 Chevrolet Silverado 1500 2WD

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