"Hard start" problems due to faulty glow plugs and wiring on GMC Suburban 1500

Faulty glow plugs and incorrect wiring to the glow plugs have been known to cause "hard start" problems.
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Average mileage: (–)
Engine affected: 6.2L V8 Diesel
2 model years affected: 1990, 1991
2 people reported this problem
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