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7.3

pretty bad
Typical Repair Cost:
No data
Average Mileage:
137,667 miles
Total Complaints:
3 complaints

Most Common Solutions:

  1. not sure (2 reports)
  2. replace intake manifold gasket (1 reports)
1999 Chevrolet Suburban engine problems

engine problem

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1999 Chevrolet Suburban Owner Comments

problem #3

Aug 092013

Suburban LTS 507

  • Automatic transmission
  • 129,000 miles

A D V E R T I S E M E N T S

THE INTAKE MANIFOLD LEAKED COOLANT INTERNAL AND WHEN I WENT TO CHANGE OIL FOUND CRANCASE FILL WITH COOLANT. THERE ARE METAL FILLINGS IN OIL I THINK THE BEARINGS SPUN AS THE CAR WAS KNOCKING.

IF THIS IS THE CASE I WILL HAVE TO REPLACE MOTOR BECAUSE OF A LEAKING GASKET.

I THINK GM SHOULD STAND UP AND REPLACE MOTOR AS THIS SEEMS LIKE A CURRENT PROBLEM WITH SUBURBANS.

- , West Harrison, NY, USA

problem #2

Jan 042011

Suburban 7.4L V8

  • Automatic transmission
  • 147,000 miles

I have not fixed it yet but believe it's intake gasket and not a head gasket. I hope to find out soon and will update accordingly. The truck has run hard as I use it for towing in the Colorado mountains. Other than this, no complaints.

- , Divide, CO, USA

problem #1

Nov 062008

Suburban LS 5.7L V8

  • Automatic transmission
  • 137,000 miles

Okay so I took the old Suburban to the lube shop asked them to check the fluids and they told me I was low on coolant, every time I go in I am low, so I ask what is causing the fluid to disappear? Now I know.

- , Cheyenne, WY, USA

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