Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1972 GMC P15/P1500 Van 6.6L Eng VIN EFACTORY OEM SERVICE PROCEDURE
Cooler Lines
| Condition | Code | Procedure |
|---|---|---|
| Abrasion damage, affecting structural integrity | A | Require repair or replacement |
| Abrasion damage, not affecting structural integrity | No Service Suggested or Required | |
| Application incorrect | B | Require replacement |
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware not functioning | A | Require repair or replacement of hardware |
| Clamp corroded, not reusable | 1 | Suggest replacement |
|
NOTE:
If clamp removed, require replacement.
|
||
| Connected incorrectly | A | Require repair |
| Corroded, affecting structural integrity | A | Require replacement |
| Corroded, not affecting structural integrity | No Service Suggested or Required | |
| Cracked | B | Require repair or replacement |
| Fitting type incorrect (such as compression fitting) | B | Require replacement |
| Flange leaking | A | Require repair or replacement |
| Insufficient clamping force, allowing hose to leak | A | Require repair or replacement |
| Leaking | A | Require repair or replacement |
| Melted | 1 | Suggest repair or replacement |
| Missing | C | Require replacement |
| Outer covering damaged to the extent that the inner fabric is visible | A | Require replacement |
| Protective sleeves damaged | 2 | Suggest replacement of sleeves |
| Protective sleeves missing | C | Require replacement of sleeves |
| Restricted, affecting performance | A | Require repair or replacement |
| Routed incorrectly | B | Require repair |
| Swollen | 1 | Suggest replacement |
| Threads damaged | A | Require repair or replacement |
| Threads stripped (threads missing) | A | Require replacement |
| Type incorrect | 2 | Suggest repair or replacement |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.